QUALITY  CCNTROL  PRACTICES 
FOR  CGXPLIANCE  WITH THE  FEDERAL 
MERCURY  VAPOR  LXYP 
PERFORMANCE  STANDAXD 
Issued by: 
~ivisiono f  Canpliance 
U .S.  DEPARTMENT OF  HEALTEI,  EDUCATION  AND  WELFARE 
Public Health Service 
Focd and  Drug  Administration 
Bureau  of  Radiological Health  ' 
Rockville,  Maryland  20852  FORWARD 
This guide is intended  to help manufacturers of  high-intensity  mercury 
vapor discharge lamps to establish adequate a a l i t y  control and  testing 
programs  for canpliance with the Federal perfomance  standard  for such 
. 
lamps  (21 GR1 040.30)  It is intended as guidance and  to define good 
manufacturing. practice in  this area.  Although. specific  sampling  plans 
are included  in  Section 4,  other  sampling  plans could be used  a s  long 
as they provide equal protection and  assurance of  ccmpliance.  CONTENTS 
. 
Page  No 
. . . . . . . . . . . . . . . . . . . . . . . . . .  
Forward  . . . . . . . . . . . . . . . .   ii 
1.0  FDA  Compliance  Policy  . . . . . . . . . . . . . . .   1 
2.0  Quality Assurance Program  3 
. . . . .  
2.1  Elenents of  a  Quality Assurance  Progrla  3 
. . . . . . . . . . . . . . . .  . .  
2.2  Objectivity  . . . . . . . . . . . . .; . .   3 
2.3  Uniform  Procedures  4 
. . . . . . . . . . . .  
2.4  Validity of  Measurements  4 
. . . . . . . . . . . . . . . . . .  
2.5  Documentation  4 
. . . . . . . . . . . . . . . .  
2 -6 Audit Procedures  4 
. . . . . . . . . . . . . .  
3 -0 Pre-Production  Ebaluation  5 
. . . . . . . . . . . . . . . . . .  
3.1  Design Review  5 
. . . . . . . .  
3.2  Evaluation of  Critical Canponents  7 
3 -3  Engineering  and P.ro.to.ty.pe. T.e.sti.ng.  . . . . . . . .  
and  Evaluation  8 
. 
4.1  Design nf  the Produc.tio.n .p.la.lit.y. C.on.tr.ol.  . . . .  
C 
and Testing Program  . . . . . . . . .   9 
4.2  Checks for Labels and Markings  . . . . . . . . .   9 
.&.   4.3  Ccmponent and In-Process  Tests  . . . . . . . .   10 
4.4  Final Product  (~estructive)T est.s . . . . . . . .   11 
4.4.1  Lamp Breakage  Conditio.ns.  . . . . . . . . .   11 
4.4.2  Lamp  Test Conditions  11 
. . . . . . . . . . . . . . . . .  
4.5  Sampling  Plans  l..3  
4 .5.1  Sampling  Plan for C.mp.on.en.t .' an.d . .. . . . .  
In-Process  Testing  13 
. 
4 -5.2  Sampling  PI ans for Final Product  T.e.sti.ng. . .   13 
4.5.2.1  Sampling by Attributes  13 
. 
.  4.5.2.2  Sampling  by-Variables fo.r  . . . .  
Tungsten Pilament Puses  14 
. . . . . . . . . . . .-.  . . . . . .  
5.0  Reliability Tests  15  / 
. . . . . . . . . . . . . . . . . .  
6.0  plality Audits  16 
. . . . . . . . . . . . . . . .  
6.1  Procedures Audits  16 
. . . . . . . . . . . . . . .  . . .  
6.2  Product Audits  . ..,  .  16 
6 -3  Organizational and  personnel Eoaluations  ; 17 
' 
iii  ,  CONTENTS Cont. 
<,  . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Appendix A  18 
. . . . . . . . . . . . . .  
A.1  Sampling by Attributes  18 
. . . . . . . . . . . . . .  
A.2  Sampling by Varia.b.le.s  . . . . . . . . . . . . . . .  19 
A.3  Sampling  T;?bles  22 
- 
Appendix B  Procedures for Laboratory  Canpliance Testing 
of  High-Intens.it.y .M.er.cur.y .Va.po.r  D.isc.ha.rg.e .Ta.m.ps . . . . .  
(June 1980)  ;  32  1.0  FDA  Compliance  Policy 
The performance  standard for high-intensity mercury vapor discharge 
lamps  issued  by  the Food  and  Drug  Administration  to becane  effective- 
March 7 , 1980, requires mamf acturer certification of  mercury vapor and 
metal halide lamps.  That certification  is the manufacturer's  assurance 
to the custan4rs that each lamp canplies with a l l  of  the applicable 
requirements of  the standard during  its useful life. 
Certification of  self -extinguishing rn-cury  vapor or metal halide lamps 
w i l l  clearly rewire destructive testing of  sane lamps.  The FDA  w i l l  
be  testing samples of  such lamps a t  its Winchester  Engineering  acd 
Analytical Center  laboratory in Winchester,  Massachusetts  (draft test 
procedures  in Appendix  B).  Controlled tests will be  performed  there to 
determine if  lamps which are certified as self-extinguishing  do in 
fact self -extinguish within the required time,  15 minutes,  under  the 
appropriate breakage conditions, 
Lamps manufactured  after the standard becanes effective and  prior to 
Septanber  8,  1981,  will be  tested to determine  if  they self-extinguish 
with canplete breakage of  the outer  envelope.  After that date they w i l l  
be  tested with only partial breakage as specified in the standard. 
,,  Sane l a p s  w i l l  undergo life testing tc assure that their self-extinguish- 
. .  ing mechanism w i l l  operate over  the useful life of  the lamp.  Also,  a t  
the same time these  lamps are tested for &rfomance,  their labels w i l l  
be  examined  to assure that they ccmply with the requirements and  w i l l  
-+ 
rgnain attached and  legible through the useful life of  the lamp. 
Destructive tests conducted by  FDA  and manufacturers w i l l  involve only 
small smples of  the production  lamps.  The actual number  of  lamps which 
need  to be  tested in this manner  w i l l  depend  on many  factors,  These 
factors include the results of  the tests  (e.g.,  how  close the cutoff 
times are to the limits),  the specific  type of  extinguishing  dwice, and 
any other tests that manufacturers can perform  an& document  which  wuld 
provide assurance directly or indirectly that the lamps w i l l  meet  the 
.  - 
-  standard throughcut  thelir useful life 
Failure of  a  single lamp to meet  the test for ccmpliance w i l l  not neces- 
sarily result in a recall by  the manufacturer  hlt may  require additional 
analysis and  testing.  If  a  lamp ails to ccmply with  the reqirements 
for self -extinguishing  lamps, . the FDA will attanpt to determine the 
cause of  that failure.  The manufacturer  w i l l  probably be  contacted and 
additional lamps ran that batch obtained and  tested before deciding  if 
a  recall of  that batch of  lamps  is needed.  If  the additions1 testing. 
- 
indicates other lamps probably do not canply with the stdard-the FDA 
may require the manufacturer  to recall them.  ' 
The =tent  of  any recall w i l l  depend on  the manufacturer ' s ability to 
bs 
determine which lamps may  be subject to a  particular  failure.  Clearly. 
it is in the manufacturer's best interest to keep canplete and  accurate 
records of  quality control testing a-.rd  design a  workable  lamp tracing 
system. 
Manufacturers should  also note  that their quality control prograns are 
subject to review by FDA.  If  a  program  is found  to be  inadequate to 
' 
assure canpliance with the standard the FDA may  disapprove the manufacturer  s 
testing program  (21 CFR  1010.2  (c)).  Under  Section 360B of  the Radiation 
Control for Health and  Safety Act of  1968,  it is unlawful  for a manu- 
facturer to continue to introduce into canmerce  lamps certified on the 
basis of  a disapproved  testing program.  In that case a  new  or modified 
testing program  would  then have  to be  developed and  suhnitted to the FDA 
for review.  If  it is acceptable the disapproval could  be  rescinded  to 
allow the manufacturer  to resume manufacture and  certification of  lamps. 
Disapproval  of  a  testing program  does not require that noncanpliant 
products be  found  first and  thus does not autanatically require a  recall 
of  products.  Likewise  the finding of  a nonccmpliant  lamp by FDA does 
' 
not autanatically mean  disapprwal of  that manufacturer  s testing 
program.  Both  situations would  require further analysis to deternine 
appropriate action.  2 -0 Quality Assurance  Progrm 
2.1  Elenents of  a Quality Assurance Prcgr?m 
The  adequacy of  a  specific quality control and  testing program must  be 
judged  on  its own  m e r i t s  and  applicability to' the product.  However, 
a viable quality control program,  in general,  should  ensure the continued 
satisfactory performance  of  a product throughout  its useful life.  The 
essential elements of  such a prcgr2-m  should  include the following: 
a.  Proper  organization and  administrative procedures  to ensure 
objectivity, 
b,  preproduction  evaluation and testing of  the product  including 
the testing of  canponents and materials obtained frcmother manu- 
. 
f acturers 
. 
c  Evaluation of  the product during arid  after production. 
d.  Valid measuranent  techniques,  analysis of  data and  treatment of 
uncertainties. 
e.  Establishnent of  confidence limits and rejecticn criteria and 
.- 
r 
the procedures for retesting the rejected .units if  they are re- 
cycled back  into the production  sequence. 
. 
f  An  audit procedure  to randanly select units for retest as a 
check on  the effectiveness of  the instituted quality control and 
testing program. 
. 
g  Life and  reliability testing procqures which determine whether 
the product w i l l  continue to meet  its design specEications during 
. 
its useful life 
h.  A  review procedure  to assure that any problans discovered  in 
its production  life are corrected and  that ap- 
-  a  product during 
propriate design changes are made  to eliminate-t hen  ran subsequent 
units produced. 
2.2  Objectivity 
Any  quality assurance progr~ms hould be  carefully structured and  admin-  . 
'istered to ensure the objectivity of  the program.  Certain safegu=ds 
against personal  prejudice and  conflicting interests have  to be-built. into 
-  .the systan  to avoid  biased decisions.  For  example,  a person  responsible 
for maintaining  production  schedules should  not  simultaneously be  responsible 
for quality control,  because he may be  less inclined  to reject large 
numbers  02  unaccepta@le units.  c 
2-3  Uniform  procedures 
A  quality assurance progrzm must  be  base2  on  standardized methods for 
the examination or testing of  the prcducts.  Specific  written procedures 
should be developed  and  faithfully followed.  Data  should be  recorded 
. 
in a  consistent manner using  standardized  f oms'  (21 CFR 1002.30)  The 
forms should prwide for recording  a l l  information relevant to the 
product  such as the identsication number  of  the product,  date of  test 
or examination,  date of  manufacture,  sample lot, results of  test,  names 
of  personnel performing  and  reviewing  the test,  identici cation of  test 
instruments,  etc.  Records are to be  kept for a  period  of  five  (5) 
>-ears (21 CFX  1002.31  (a)1  . 
2.4  Validity of  Measuraents 
A  valid program of  measuraents involves a thorough evaluation and  error 
analysis of  the test methods and  insAcruments.  A  pa-iodic  recalibration 
of  measuring  instruments against a' standard  is an  important  ~.oceduref or 
maintaining  a  consistent measuring cepability. 
2 -5  Documentat ion 
.-- 
A  cmplete written documentation of  the quality assurance program  should 
be mahtained  (21 CFR 1002.30  (a) (1)). This should  include description 
of  tests and  the&  sequence,description  and  evaluation of  the measure- 
ment  instrumentation and  techniques  (including kstrument  calibration 
records),  the rejection criteria or confidence  limits used  and  the 
justification for the-particular choice of  such limits, methods of  data 
analysis,  sampling plans,  etc.  If a  sampling  technique must  be used, 
it must  be documented  and  rigorously followed. 
2.6  Wdit Procedures 
Pdeqyate  audit procedures should be  implemented  to' act as a  further 
check on  the continued validity and  effectiveness of  the quality control 
-  program.  Randm  sampling  is the only acceptable met$&  in selecting 
units for audit testing.  The audit should  be  independent of  the quality 
assurance tests.  . 
' 
3 .0 PRE-PRODUCTION  EVALUATION 
I 
The preproduction evaluation and  testing  should be  constructed  to 
include  (1) a review of  the design to ensure that the design w i l l  yield 
a  ~1-ducitn   ccmpliance with the performance  standard, (2) evaluation of 
critical canponents and material obtained ran other manufacturers for 
use in the lamp and  (3)  engiceering and  prototype testing and 
evaluation to confirm  that the lamp can be manufactured  in canpliance 
with the standard. 
3 -1 Design Review 
Before the manufacture of  the lamp begins,  its design must be  analyzed 
to ensure that the finished product w i l l  canply with the Federal Per- 
formance  Standard.  The requirenents of  the mercury vapor  lamp  standard 
that must  be  considered  in design review include: 
a.  The  lamp must  be  permanently labeled or marked  in  such a manner 
that the manufacturer  and month  and  year  of  manufacture  (all of  which 
may  be  expressed  in code)  can be  determined  on an intact lamp and 
after the outer envelope of  the lamp is broken or renwed  (21 CFR 
1040.30  (c) (1)( ii)).I f  the dates appear on  both the lamp envelope 
.  and  an internal part of  the lamp,  be  sure that both dates are the 
._ 
same.  Labels or marks  shall be  sufficiently durable to be  legihle 
throughout  the useful life of  the lamp.  . 
f 
b.  The outer envelope of  the lamp must  be  clearly marked  with the 
letter "T"  or "R"  as appropriate  (21 CFR  1040,30(d) (2) and 
. 
e  1 )  This mark must  also appear on another part of  the lamp in 
such a manner  that it is visible after the outer envelope is hroken 
or removed,  Be  sure that the "T"  or "Rn,m arks are clearly.distin- 
guishable frm and  w i l l  not be  confused  kith other information that 
may  appear on the lamp;  e,g,,  they shauld not be  a part of  or be 
confused with any part of  the lamp designatiou code, 
. 
, 
c  The lamp packagir?g uniquely associated with -the lamp  (i.e , 
- 
innermost*lamp packagiq) ~ u s bte&   a  label or -tag which  contains 
the full name  and -address of  the manufacturer,  place of  manufacture 
and month and  year of  manufacture if  such a label or tag is not 
affixed  or inscribed on the lamp itself  (21 CFR  1040.30(-c) (2) and 
21 CFR 1010.3(a)).  Where  the lamp is sold under  a name  other 'than 
the manufacturer,-the full name  and  address of  the canpany under 
whose name  the lamp is sold may  be  set forth prwided  sufficient 
infomation is provided  to the Bureau  of  Radiolgical Health to 
-allow  the Bureau  to identify the manufacturer.  The place -of 
msnuf acture may  be  expressed  in code,  However,  no  specific  place 
' 
*Note :  This has been modified  by  the Bureau  s policy statAent 'of 
A p r i l  25,  1980,  wh.ich allows the date of  manufacture  to appear 
-  on  the outer packaging  rather than the intermost  packaging 
until Septanber 7,  1980.  of  manufacture  identification w i l l  be  required  if the place of  mam- 
facture is same as the'address of  the manufacturer  stated on  the 
label or  if  the manufacturer has only one place of  manufacture  for 
high-intensity  mercury vapor discharge lamps and  has identified 
- 
that place of  manufacture  to the Wlreau.  The rnonth  and  year  of 
mamfacture can not be  coded tut nust appear  in  full kitho~tah - 
- 
reviation as in the follonag example  Manufactured:  Narch  i980. 
The month.and  year of  manufacture  on  the packaging inl.?st  he  the same 
as that which appears  (in a coded  or uncoded  forn) on  the lamp.  In 
lieu of  providing  the full date of  manufacture  on  the lamp packgag, 
howwer,  the manufacturer may prwide on  the lamp packaging  the key 
to the lamp date of  manufacture code  (see BRH policy statanent 
dated February 25,  1980). 
d.  The lamp packaging  uniqlely associated with the lamp must 
also bear  a  label or tag which contains a  statanent by the manu- 
facturer certifying  that the lamp conforms  to the requirements of 
the Federal performance  standard for high-intensity  mercury vapor 
discharge  lamps  if the certification label or tag  is not affixed or 
inscribed  on  the lamp itself  (21 CFR  1040.30  (c) (2) and  21 CFR  1010.2 
(b)). The certification statanent can be  in any of  the following 
acceptable forms: 
"Canplies with DFEW radiation performance  standards,  21 CFR 
Chapter 1, Subchapter J" 
"Product canplies with applicable DHEM  standards under  the 
Radiation Control for Health and  Safety Act  of  1368. " 
Other certification st-atanents may be used as long  as they  are clear 
. 
ar.d unambiqucrus 
e,  Lamp  pzckagi~g (21 CFR1040.30  (bI(3)) for eachmercuFyvapor 
lamp must  clearly and  prcxninently display the lett-  "T" Gr  "R"  ar,d 
the warning  IzSels for self -extirquishing  or non-self  -extinquishing 
l~mpsa s appropriate  (21 CTR  1040.30  (dl (3) and  (el (2) respectively). 
-. 
f.  Seif -extinguishing rnechanisus must  be  designed  to assl;reTthat 
. 
the lamp will canply with the requirene-nts  of  21- CFR 1040.30  (d) (1) 
The  following  factors shaulti be  consiciered  when  designing  s n ~ hm ech- 
anisas : 
1.  The design cat-off  time  (i.e.,  the mechanism)  should be 
designed  to function reliabily well within the 15 minute  limit 
following  lamp' envelope breakage, 
- 
2.  .Adverse effects of  tolerance buildup. and  production  errors 
on  proper  functioning of  the self-ejrtinguishing mechanim  should 
-b e minimiz+,  i.e.,  it should  be  a  "forgiving"  design,  . 
3  The ability of  indizect  (non-desw-i;  8-s  U~Dp redict 
and  ensure canplidnce of  the canpleted lamp ~55%t!& z  xer@xe- 
ments of  the standard  (i. e  .,  use of  n o n 4 ~ tk~zst.dh  a  n  
--- 
reduce the number  and  cost of  destructim- t~S2.3:a~ d  
4.  The  susceptibility of  the self-exthg-qx- 
to degradation in performance because of  GI? em?%mmtmem.;tal 
factors,   
g.  Lamp  advertisanent for non-self-extinguis~-  s  nmdt somtain 
the warning  statanent required  by  21 CPR  1040.3B  (k!:( :3iF- 
statement need  not be  repeated  for each lamp ~Z-I  iY. is dear 
as to which  lamps the statanent applies.  Be sxm  -3 %e:  wam~ipq 
statement is contained  in a l l  advertisanent as ~3~3--m&p2  ll Ci?R 
lC4O.30  (b) (2)  and  that personnel responsible Szr .&.IFE~-  are 
. 
aware of  this reqirenent 
3 -2  Evaluation of  Critical Cauponents  \ 
Certain components can affect  the canpliance of  mercuxy v ; T ' ~L amps,  This 
is particularly true for self-extinguishing  lamps.  A@ass &kxcz&mc  or 
an electrical or mechanical canponent may be  critic& F ,a-c 
Tags and  labels may also be  critical for canpliance.  iKEsi.3~~si m% c x s x ~  
ponents are fabricated by the manufacturer  of  the laup a:  ern  a 
. 
, 
vendor,  proper  evaluation is essential t o  determine  ti3bs - ,
w i l l  crmply with the applicable standard akter man- t T&E  re- 
sponsibility for product canpliance rests with th e-n r ..  .  &tbe 
final. product and  not the supplier of  cmponents or n&temmL.,  Zlbe 
w- 
testing of  a l l  critical cmponents is therefore,  an 3napm- 
sibility of  the manufacturer,  Important aspects of-  exidu-izdi5h .nr at tkse 
-= 
critical cmponents prior to their use in the lamp Lirdk;: 
a.  Perf omance specifications  for the criti~il~t iin 
be developed taking b t h  the requirments of  t6tre  m d  
and  a  tolerance analysis of  the product  into  W 
tolerance analysis is a calculation of  the range  of - 
a  product that can result from variations that c a m  amim  5zi ommpnents. 
Such an analysis should,  whenever  possible,  ke  wdiidated. 
b.  All critical canpnents should be  tested T t i n m ~ ~~~.m? t E & k  
performance  is within the range nf specificatims neqnErei3 5ar them 
by  the manufacturer of  the final product.  Manv  3%~ f i z ~ ~cn&S ~  
critical ccxnponents are not possible or feasibrle &tt;En:  Uikese a- 
ponents have  been  incorporated  into the product  exmqixf om a dlesbxc- 
tive testing basis.  For  example,  a  tungsten  f i 2 l m e  m s d  9s a fnse 
-  in a  self-extinguishing mechanisn  should  be  chezM ffim pmpzc weight 
and dimension.  Wherever  pssible, a  100-perce&  % e S S q  a&  azmn- 
ponents  is recamended.  If  this is not possiblt~  ilksvsim,  sanpling 
pxx@ures having  danonstrable stetistical val2tii9 m q % IE  m s d  
(see 4.5.1).  c.  15 a t  any time the design specifications or materials of  any 
critical camponents are changed,  the design of  the entire lamp 
should  be  reviewed  to ensure that the change does not  in any way 
affect its canpliance with the performance  stardard. 
3 -3  Eqirieerhq  and  Prototype Test-  and  Evaluation 
Engiqeering models and  prototypes  should  be  tested  thoroughly and 
exhaustively to assure that the lamp can be manufactured  i? canpliance 
with  the performance  standard,  and  that it w i l l  ranai?  in canpliance 
under  all forseeable conditions during  its useful  life.  This would  include 
adequate transportation  tests,  tests of  performance under  expected and 
adverse enviromentzl conditions,  use and  a h s e  testing,  and  accelerated 
life  tests.  Any  design changes should be  properly documented,  tested 
and  evaluated  in relation to &prductc anpliance. 
Sections 4  and  5  of  this document  should Ix consilted for more detailed 
guidance on  type of  tests,  test parameters,  test conditions,  and  testing 
. 
proc dure s  4.0  PRODUCTION  TESTING 
4.1  Design of  the Production Quality Control and  Testing  Program  - 
After  a manufacturer has verified  through design rev5 ew and  prototype 
testing that a product  can be manufactured  in canpliance with  the per- 
formance  standard,  he must design and  implaaent a production quality 
control and  testing program  that w i l l  ensure that each individual  lamp 
manufactured  canplies with the standard.  In designing  the production 
cpality control and  testing program,  it is first necessary to identify 
the parmeters that need  to be  checked or tested in order to determine 
ccmpliance with the Federal performance  standard.  This w i l l  depend  on 
whether  the lamp is intended.  to be  self-extinguishing  (T Type)  or non- 
self-e-tinguishing  (R Type)  Both  types of  lamps reqire marking  and 
labeling as previously  indicated  (Part 4.1).  In addition,  self- 
extinguishing 1-ps  must  ccmply with  the requirement  that the lamp  extinguish 
in 15 minutes following canplete hreakage or raawal of  the outer envelope 
and,  after Septanber 7 ,  1981,  foll.owing  breakage or ranwal of  not  less 
than 3  square centimeters of  contiguous surface of  the outer envelope. 
A l l  of  the above requirements must be  checked or tested.  In the case of 
labels or markings  .such checks or tests consist of  merely determining 
.  that the correct labels or marks are present and properly affixed  to or 
. ,  inscribe3 on the lamp andfor  lamp packaging.  Checks  and tests for 
c  canpliance with the self-extinguishing  requirements can be  of  two 
g-   different types:  destructive tests and  non-destructive  tests. 
Destructive tests are tests of  the self-extinguishing  mechanism re- 
if 
quiring breakage  of  the outer envelope.  Non-destructive  tests are tests 
conducted on canponents and  during  the manufacturing process which are 
intended,to  assure that the self-extinguishing mechanism would  operate 
properly and cause the lamp to extinguish  the outer  envelope were 
broken as prescribed  in the standard.  Properly designed non4estructive  . 
(or indirect)  tests can  increase canpliance confidence levels by  im- 
prwing product quality and  help reduce the level of  destructive  (direct) 
testing.  - 
.4.2  Checks  for Labels and Markings 
Checks  should be made  of  the fol.lowing labels and markings:- 
4 -2.1  Name  of  manufacturer  on  lamp  (check marks or labels both 
inside of  the lamp and  on the outer envelope). 
4.2.2  Month  and  year of  manufacture  on  lamp  (check marks  or 
labels both  inside the l b p  and  on  the outer envelope). - 
4.2.3  The  letter "T"  or nR'*, as appropriate,  on the outer en- 
vezope  and  on  another part of  the lamp.  4.2.4  The  full name  and  address of  the manufacturer,  place of 
manufacture and month and  year  of  manufacture  (or the key to 
the date code,  if  it is coded  on  the lamp)  on  the innermost  lamp 
. 
pac kag in? 
4.2.5  The  letter "T"  or  "R",  as appropriate,  on lamp packaging. 
4.2.6  .The warning statanent for  "T"  type  lamps or the warning 
. 
statenent for "R" type lamps,  as appropriate,  on  lamp packagiq 
4 -3  Can~cnenta nd  In-Process  Tests 
The  following  types of  cmponent and  in-&process tests should be  consiciered 
in establishing t~sth-gp rogr=s  for self -extinguishing  lxnps: 
4 -3.1  Tests for Mechanical  Switches 
1,  Check of  metal parts for proper dimensions,  tensile 
strength,  etc. 
2.  Check of  switch contacts for proper  surface characteristics, 
, 
aligment  and  contact, 
3.  Check of  switch spring tension to assure that contacts 
w i l l  open, 
4.  A visual aligment. check of  switch assembly after outer 
envelope is installed,  if  possible. 
4.3 -2  Tests for Tungsten Filament Fuses 
1,  Check of  incaning  tnngsten wireifor proper  weigh.t  and 
dimension. 
2.  Check of  cmpleted lxngsten filaments for proper  weight, 
spcirq, 2nd  number  of  turns. 
-. 
3.  Check of -tuxsten filaments to be  sure there are no 2oreign 
elanents _present that may  cause a short,  e.g.  fragmo-nts of 
the metal rod  on which the filment was  wcund, 
4.  Liqhting  each lamp to cKeck that the light outwt of  each 
f ilanent appe&s  normal. 
The  above  tests are nct a l l  inclusive and  sane may  not be  possible or  . 
- 
practical  for a particular  lanp or manufacturing  process,  The manufacturer 
should  evalnatc and  adopt other or additional canporient or in-process  tests 
which might  be useful.  Such .tests may  be  conducted  on a  10G% basis or; 
when  appropriate,  on a sampling  basis.  4.4  Final Product  (3estructive) Tests 
Tests must  be  conducted on  self -extinguishing  lamps after manufacture using 
statistically valid  sampling  techniques.  Lamps  are to be  hroken  as required 
by  21 CFR  1040.30  (dl (1) while being operated.  under  test conditions pre- 
scribed  in the standard (21 CFR 1040.3 0  (f))  
4 -4.1  . Lamp  Breakage Conditions 
I.  "Each self -extingu i shing  lamp manufactured  aft&  March' 7,  1980 
shall cease operation within  a  cumulative operating time not to 
exceed  15 minutes following cmplete breakage  or removal  of 
the outer emelope  (with the exception of  fragments extended 
SO  millimeters or less fran the base shell"  (21 CFR  1040.30(d) (1)( ill. 
The manufacturer must design,  fabricate and  install apparatus 
that w i l l  efficiently,  reliably,  and  canpletely break the lamp 
outer  envelope  (see 4.4.2).  Generally,  this can be  acccanplished 
by  striking the lamp a t  one or more  preselected points with a 
solid object while  the lamp is being operated. 
2.  "Each self -tinguishing  lsmp manufactured  after September 7, 
1981 shall cease operation within a cumulative operating t h e  
not to exceed  15 minutes following breakage  or ranoval  of  a t  
least 3  square centimeters of  contigu-s  surface of  the outer 
envelope"  (21 CFR  1040.30  (d) (l)'(ii))I.t  is assumed  that after 
Septenber 7,  1981,  the worst case breakage condition w i l l  be  a 
single hole exactly. 3  square centimeters in area.  The manufacturer 
w i l l  have  to design,  fabricate,  and install an apparatus  (or 
develop a method)  for efficiently and reliably creating  the 
required  hole while the lamp is operating  (see 4-4-21..  A  hole 
o  the required  size could be made  in; the lamp using a drill  . . 
with a diamond drill bit.  A hole could  also be  prodyed  by 
heating  a  =all  area of  the lamp  surface and  then creating the 
- 
hole using a  ganch. 
4 -4 -2  Lamp  ~est'conditions( 21 CFR  1040.30  (f 1-1 
1.  Lamps  should be tested in an enclosure having  a volume  of 
not less than 0.227  cubic meters  (8 cubic feet).  The use of an 
enclosure is desirable to. provide  for operator safety and  a con- 
trolled test environment. 
2.  m y  lamp designed to be  operated only in a  specific fixture 
or luminaire that the lamp manufacturer  supplies or specifies 
shall be  tested in that fixture or luminaire.  A l l  0th-a lamps 
shall be  tested while operating without a reflector or other 
surrounding m*terial;  i. e.,  the lamp  shall be  attached .only to 
a_  W e s ocket to supply power.  3.  The  lamp shall be oriented  in  the test chamber to the 
orientation indicated or recanmended  by  the manufacturer. 
If  the manufacturer does not reccmmend  a particular orientation 
or recamends more  than one orientation the Imp shall be mounted 
in the worst case orientation for canplianance.with the standard. 
4.  The  initial air temperature a t  the time of  lamp  start up 
+ 
shall be  25  So  C.  Heating  and movenent  of  the air surrounding 
the lamp shail be  that produced  by  the lamp and  ballast alone; 
i.e.,  the &ir tanperature and  air movement  inside the test 
chamber  shall not be artificially controlled or influenced by 
fans, coolers,  heaters,  etc. 
5.  The  lamp shall be  operated  on a reference ballast,  which  is  - 
defined  as an "inductive reactor design4 to have- the operating 
characteristics as listed in Section 7 in the American  National 
Standards Specifications for High-Intensity  Discharge  Tap 
Reference Ballasts  (ANSI C82.51977)  or its equivalent." 
6.  The voltage applied to the reference ballast shall be  that 
recommended or specified for operation of  the lamp.  A f t e r  the 
lamp  starts up and  its operation stabilizes,  the measured  current 
should  be within  the acceptable current range for the lams. 
As long as the current is within the acceptable range,  it need 
.  not be  adjusted,  either before or after lamp breakage  (even 
if  the lamp current changes significantly after breakage  of  the 
outer envelope)'.  If manufacturers wish to maintain a constant 
lamp current following  lzmp breakage  in order  to simulate 
worst case conditions,  the Bureau  w i l l  not object as long  as it 
can be  established  that the lamp extinguishing time would  never 
be  less than  that which  would  result'frcm testing as indicated 
above.  I 
7.  After  the lamp operation has stabilized,  the lamp  shall 
be broken  in the required manner.  The  t g e  fran the manent 
of  breakage to the time when  the lamp ceases. operation shall 
be measured  and  recorded. 
8.  After campletion of  the test the lamp  should  be  examined 
to make  sure that lamp breakage was  as specified in- the- 
, 
standard  (21 CFR 1040.30  (dl  (i)o r  (ii)a s appropriate) 
and  that the .lamp did not  extinguish for any reason other than 
by  operation of  the self-extinguishing mechanisn.  . 
, 
4 -5 Sampling Plans  - 
4.5.1  Sampling  Plans for Canponent and  In-process  Testing 
Cmponent and  in-process  testing should be  conducted on a  100% basis 
when  possible to do so.  However,  when  sampling  ~roc~dumreu st  be 
used  a  statistically valid sampling  scheme based  on MIL-STD-1OSD 
for attrihtes sampling or MIL-STD414  for variables sampling  Or 
equivalent should be  anployed.  Acceptable  quality levels  (AQL) and 
rejection limits should be  chosen that are appropriate for the 
cunponents and  processes being controlled. 
4.5.2  Sampling  Plans for Final Product Testing 
Two  types of  designs for mercury vapor  lamp  self-extingui shing 
mechanisms  have been developed  for canpliance with  the performance 
standard for such lamps.  One  design  is a mechanical  switch held  in the 
on  (closed) position by  the outer glass envelope of  the lamp.  If 
the entire glass is shattered,  the circuit is immediately broken 
and  the lamp goes out.  This design w i l l  not meet  the more  stringent 
standard to go into effect after  Septenber 7,  1981, which  require 
the lamp to extinguish in the event that the glass envelope  is 
punctured.  The other design is a  tungsten filament fuse that 
should be capable of  meeting  the more  stringent standard  because  it 
is based  on axidation and  destruction &f the tungsten  filament 
that canpletes the cFrcuit to the light source.  In the presence 
of  a*,  axidation should occur causing an interruption of  the 
circuit.  There .is a  trade-off  with this design,  however.  The 
life of  the bulb is likely to be  related  to the length of  time  it 
takes the filament to burn out.  Thus,  if  the arc-extingui shing 
design t h e  is  to^  short the lamp may  suffer unacceptable' life 
. 
shortening-. 
The  sampling  plans contained  in this documen_t are intended only 
as a  convenience for manufacturers.  Any  plan which  provides 
equivalent protection may  be  used.  Manufacturers  are encouraged 
. 
to adopt equivalent plans which  result in reduced  sample  sizes. 
- 
4.5.2.1  sampling  by  ~ t t r i h t e s  
Since all lamps,  especially. those using mechanical  switches, 
can be  classified as being defective or not defective,  de- 
pending upon whether  the lamp stays on  or goes out when  the 
outer envelope  is hroken,  they conform  to the process moni- 
toring- procedures of  sampling  by  attrihtes described  in MIL- 
STD-105D.  The  tungsten filament fuse lamps,  however,  can 
take advantage of  the smaller  sample  sizes associated with 
variables sampling described  in the next  section.  It is the  intent of  the Bureau  of  Radiological Health  that the attributes 
inspection procedures conform  to the procedures given  in MIL- 
STD-1OSD  or their equivalent and  include additional restrictions 
specific to this problan.  While  it is an  ideal that no  lamps 
produced  should  fail to caaply with the standard,  the Bureacu 
of  Radiological Health believes that a testing progrm  is 
adequate if  it ensures that,  on  the average,  not more  than  1 
lamp per  1,000 produced  w i l l  fail to canply.  Under  the 
guidance of  the referenced  sampling  pl-ans,  the Bureau  recog- 
nizes that such an acceptable quality level  (AQL)  w i l l  result 
in the destruction for testing plrposes of  a  large fraction of 
the lamps produced  for any reasonable  lot size.  It is clear 
that large sampling fractions would  constitute an unacceptable 
laxden on  the manufacturer  and  the pblic because  of  the 
prohibitive per unit costs of  testing, 
Therefore,  the Bureau  of  Radiological Health proposes that the 
lot-by-lot  AQL  not exceed  1%fo  r product  sampling  and  that the 
lots not be accepted  if  one reject  is found  in any sample. 
This w i l l  have  the effect of  decreasing  the AQL  as lot sizes 
(and,  therefore,  sample  sizes) are increased.  Lower  lot 
qalfty protection can be  tolerated in mall lots kt not  in 
larger lots.  However,  the long  term  average ,-cent  defective 
must not exceed  0.1%-  Sampling plans based  on MIL-STD-1OSD 
and  this guidance are included in Appendix  A. 
4.5.2.2  Sampling  by Variables for Turqsten Filament !?uses 
Since tungsten filament fuses w i l l  always oxidize and  interrupt 
lamp operation in a finite time,  lamps using  such fuses can be 
tested by variables sampling  inspection.  The variable that 
'would be measured  is self-extinguishing time.  Variables 
sampling- has the advantage that sample  sizes can be  signifi- 
cantly reduced.  Variables sampling  plans 'set forth 'in  MIL- 
STD414 or later volume as modified  by  this guidance  are 
included in Appendix  A.  A l l  restrictions set forth in MIL- 
STD414 .should be  followed  in addition to those modifications 
stated here.  The variables sampling  plari contained  in Appendix 
A  is based  on the assumption  that the measured  parameter  is 
normally distrituted.  Should  the normality assumption  not be 
satisfied, it is possible to base  an  inspection  by  variables 
plan on  any well-behaved  probability distribution.  such' sampling 
plans will be considered on a  case-by-case  basis.  In any case,  the 
sampling  plan  should assure that,  on  the average,  not more  than 
one lamp per  1,000 produced  w i l l  f a i l  to canply.  RELIABILITY TESTS 
Product reliability is the probability of  a product performing  its 
intended function over its intended life and under  the operating conditions 
encountered.  The  primary product reliability concern  of  mercury vapor lamp 
manufacturers has been lamp useful  life.  The mercury vapor  lamp performance 
standard adds a new  concern,  the ability of  self-extinguishing  devices to 
function reliably during the useful  life of  the lamp.  Reliability of  the 
self -extingu is hing mechanisn must  ke carefully considered in lamp design 
and must  be  proven through engineering  evaluation and  prototype and  production 
testing. 
For mechanical  switches,  processes that may  decrease reliability include 
tho.se  that cause  switch contact welding,  netal fatigue,  and decreased 
tensile strength.  Although  lamps with filament fuses are expected  to self- 
' 
extinguish without fail, there'may be  aging processes that 'could lengthen 
. 
, 
the self -ext ingu ishing time;  e.g  the current may not increase as much  when 
the lamp is broken  after lamp aging an  it wuld if hoken when new. 
Life and  reliability testing is routinely conducted by mercury vapor  lamp 
manufacturers to assure that lamps w i l l  meet rated life specifications. 
Tests of  the  self-extinguish-  mechanisn  can readily be  added to the life 
test protocols.  The conditions under  which  lamps are operated -should 
..  simulate,  to the degree possible,  actual use and  envirornnental  conditions. 
, 
Each life test sbuld be  conducted for a period  of  lamp operation equal t o  
the rated life of  the lamp and,  preferably long&. 
At the end  of  the test,  lamps that are still operating  should  ke ranoved 
fran the&  lifk test fixtures and  the self-extinguishing  mechanism  tested 
under  the conditions described  in  itan 5.4.2  of  this guide. 
The  possibility of  using accelerated life  teqing mothods  should be  investi- 
gat&.  Valid accelerated life tests can shorten considerably +he  lerqth 
of  time that each lamp must  be  operated,  thereby making  test results a ~ a i l a b l ~  
much  sooner.  However,  manufacturers are cautioned-to  ensure that accelerated 
life tests,  when  used,  w i l l  not give false or misleading  results. 
- 
. 
\  6.0  QUALITY  AUDITS 
A  quality control program  can be  on11  as good  as the people who  are 
conducting that program.  Even  the most carefully planned  and  technically 
and  statistically valid quality control procedures  w i l l  not assure ccmpliance 
with the mercruy vapor  lamp performance  standard  if  those procedures are 
not properly implanented and  followed  faithfully.  To  ensure the effective- 
ness of  the -quality control program  it should  be monitored using  accepted 
quality audit techniques. 
The  three elenents of  a quality audit are procedures audits,  product  audits, 
and  organizational and  personnel  evaluations, 
6.1  Procedures Audits 
Frequent audits should be  conducted  to verify that the q a l i t y  contra1 
plan  is followed.  This includes ensuring  that  (1) a l l  required 
checks and  tests are performed,  (2) there is no deviation fran 
estabilished test procedures,  (3)  samples are taken  in accordance with 
the sampling  plan,  (4)  all required  statistical calculations are 
properly made  ar?d correctly used  in determining  smpling levels, 
(5)  lot rejection limits and reaction plans are rigorously canplied 
with,  and  (6) full and  cauplete quality control and  testing records 
are generated and maintained.  . 
The results of  procedure  audits are a measure of  managerial control and 
can  indicate areas requiring  better  instruction and  closer supervision. 
6.2  Product Audits 
A  product audit is an  independent evaluation of  a relatively mall 
nGber of  products.  Its prpose is not  to control q a l i t y  ht to 
determine the effectiveness of  the quality control system. 
Canpleted  lamps that are audited may  be  taken a t  the end  of  the pro- 
duction line or frau warehoused  stock.  In-process  audits could  also 
-  be made  of  canponents and  sub-assemblies  when  relavant cpality charac- 
teristics can be  evaluated during  the production process.  However,  a 
particular  characteristic should only be  audited following  the 
canpletion of  the quality control procedure related to control of 
that characteristic.  For  rixample,  if a date code tag  hside  the 
lamp  is checked  by  quality control during  lamp assenbly,  the 
presence of  that tag could  be  audited a t  sane point  in prcduction 
after that quality control check is made.  Audits  should cover a l l  applicable reqiraaents of  the performance 
standard  including -marks and  labels as well as proper  functioning of 
. 
the self-extinguishing  mechanisn  Audit results should be  analyzed 
to identify specific areas that call for further  investigation of 
design,  processing,  control methods,  procedures,  or personnel 
performance.  Corrective actions shall be  applied where  the results 
of  the analysis dictate. 
6.3  Organizational and  Personnel Evaluations 
The results of  the wality audit  should  be used  to access the adecpacy 
and performance  of  organizational units and personnel.  Audit  results 
may uncover underlying  weaknesses  in orga~izationo r managerial 
structure or they may  indicate need  for additional training  or 
instruction for personnel  or even need  for disciplinary action.  APPENDIX  A 
SAMPLING  PLANS 
A.1  Sampling  by  Attributes 
The manufacturer w i l l  determine the lot size and  choose the ap- 
propriate letter code fran Appendix  A,  Table I.  Then  the appro- 
priate sample size and rejection limit w i l l  be  read  fran Appendix 
A,  Table I1 (normal inspection)  and  the sample results w i l l  be 
obtained.  The  lot w i l l  be  rejected  if the number  of  tested  lamps 
that fail to extinguish equal or exceed  the rejection limit.  If 
a  lot is rejected tightened  inspection  shall be  instituted fol- 
lowing  the sampling  plan  specified  in Table  I11 and  shall ranain  in 
effect until five  (5) consecutive lots have  been  considered  ac- 
ceptable,  a t  which time normal  inspection may  be  reinstituted. 
When  normal  inspection  is in effect,  reduced  inspection may  be 
instituted following  the sample 'plan specified in Table  IV pravided 
the preceding  10 'lots have been  on  nornial  inspection and the process 
average has not exceeded one  (1) defective lamp per  1000.  If  less 
than 1000 samples have  been  taken and  none  have  been rejected,  it 
can be  assumed  that the process average has not exceeded  1 defective 
per  1000,  When  reduced  inspection  is in effect,  tightened  inspection 
shall be  instituted following  lot rejection if  the process average 
exceeds one defect per  1000 lamps.  If  the process average does not 
exceed one defective per  1000,  normal  ins+ction  shall be  instituted 
following  lot rejection when  reduced  inspection is in  effect. 
There  should be  no  canpranise of  the process average percent de- 
fectives being.less than 1 per  1000.  The method  of  allowing  a  lot 
rejection rule based  on a larger AQL  is merely a convenient  instrument 
to allow an  inspection process that does, not impose  a  prohibitive 
burden  on  the manufacturer,  These requir'aaents, which  exceed  those 
given  in MIL-STD-lOSD,  are imposed  to ensure that the Bureau  ac- 
ceptance  level is not ccmpranised.  A, 2  Sampling  by Variables 
The Bureau  requires that the percent defectives shall be  less than 
1 in 1,000 which  implies that the percent of  self-extinguishing 
times that exceed  the standard value of  15 minutes  shall be  less 
than  0.1%.  If  we  let "p"  be  the theoretical but unknown mean  self- 
extinguishing time and "s" be  the sample  standard deviation of  the 
self -extinguishing  times,  then we require 
where k  is the standard normal value corresponding  tn a  probability 
. 
of  1 in 1,000  (0.001)  The manufacturer  should furnish data to 
support the use of  the normal distriktion function for testing 
prposes.  If  this normality assumption is acceptable,  then k  = 3.1 
, 
and  we  can  solve for p  the mean  self-extinguishing  time. 
The manufacturer may  use one of  a  number  of  procedures  to ensure 
that the percent defectives is less than 1 in 1000,  For  suf- 
ficiently large lot sizes the manufacturer may use the 15 minutes 
for the upper  specification limit  (U)  and an AQL  of  0.1%.  This  is 
the most direct method  to ensure the desired quality,  Alternatively,  a 
lower  in-factory  rejection limit can be  established based  on a  higher 
AQL.  This methcd  allows sane flexibility of  stmple size partic&rly 
for the smaller lot sizes.  The main  objective under either method 
is to maintain the process average a t  a  lwel to ensure the percent 
defectives being less than 1 in 1000,  For  example  if  an AQL  of  1% 
is chosen,  then the upper  specification l i m i t  should be  set such 
that the self-extinguishing  times of  not more  than 1 in +00 h l b s  
(0.01)  would  exceed  that specification,  therefore 
where  "Urn  is the upper  specification l i m i t  and  I'mm" is the standard 
normal value corresponding  tn a  probability of  0.01.  Thus . 
m  = 2-32 and 
, 
Therefore 
U  = p + 2.32s  = 15 -'3.ls  + 2.32s 
- 
U  = 15  0.78s  (51   Therefore,  if the theoretical mean  (p) of  the self-extingulshing 
times and  the standard deviation  (s) of  the self-extinguishing 
+ 
times of  the samples is such that p  3 -1s <  15 and  the self- 
extinguishing time specification limit  (U)  is equal  to or less than 
15-  0.78s,  lots should be  accepted and  not rejected,  since the 
process average of  lamps that exceed a  self-extinguishing  time of 
15 minutes would  not be greater than  1 in  1,000, 
The  sampling  plan discussed below  is based  on the preceding 
technique and use of  an AQL  of  1%w ith variability unknown.  MIL- 
STD414 should be  consulted for plans using other AQL's.  The 
manufacturer w i l l  determine the lot size and  choose  the appropriate 
sample letter code fran Appendix  A,  Table V.  Then  the appropriate 
sample  size w i l l  be read  fran Appendix  A,  Table V I   (AQL  1%a)n d  the 
sample results w i l l  be  obtained,  To  determine  lot. acceptance or 
r ej  ection the tollowing  quantity is calculated : 
x 
where  is the sample mean  self -extinguishing  time,  That  value 
is canpared with the value of  K for normal  inspection  taken fran 
Appendix  A,  Table VI.  If  Q,  is equal to or greater than K, the 
lot is accepted,  The  standard deviation should  be  estimated  by 
the following  calculation : 
where  n is the sample size and x  is the individual lamp 
extinguishing time- 
Tightened  inspection shall be  instituted when  the estimated prpcess average 
canplted ran the preceding  ten  (10)  lots is greater than the AQL  (1.00 
percent).  Tightened  inspection is also required when  the number of  lots 
with estimates of, percent defective abwe the AQL  ran  the preceding  5,  10 
or 15 lots is greater than the given value of  "T"  in Appendix  A,  Table VIII, 
and  the process average ran  these lots exceeds the AQL.  ~ o & a lh spection 
may  be  reinstated  if  the estimated process average of  lots under  tightened 
inspection is equal to or less than the AQL,  - 
Reduced  inspection may  be  instituted provided  (1) the preceding  ten lots 
- 
(or other designated  number  of  lots) have  been under  normal  inspection and 
- 
none  have  been rejected;  (2) the estimated percent defective for each of 
the preceding  5,  10 or 15 lots is less than  the applicable lower  l i m i t  show; 
in Appendix  A,  Table  IX or,  for certain sampling  plans,  the estimated lot 
percent defective is equal to zero for a  specified number  of  consecutive 
lots (see Table M); and  (3) production is a t  a  steady rate.  However,  normal 
inspection shall be  reinstated  if  a  lot is rejected,  the estimated  process 
- 
C  average  is greater 'than the AQL,  or production  becanes  irregular or 
-  delayed. 
T 
-  - 
c-  The  estimated process average referenced above  is the aritl-xnetic  mean 
of  the estimated  lot percexit defectives canptted fran the appropriate number 
of  lots.  The  estimated lot percent defective is to be detezinined  ran 
Appendix  A,  Table X  for any particular value of  Q,  (quantity in the  extraae 
left hand  column)  (see equation  (6)1   and  sample  size.  A.3  Sapling Tzbles 
Table  I 
Sample  Size Code Letter far 
Samplhig  by Attribtes 
Lot  or  batch  size  Saxa~leC  ode  Letter 
(Adapted fran MIL-STD  lOSD, Table  1) 
Table  I1 
Samplesize  Sample  %of  A@  Number of  Defects 
Code  Size  ~ o t   (5) .  Accept  Rej  ect 
Adapted  fran MIL-STD  Table  11-A)  - 
., 
Table I11 
Tightened  Inspection by  A t t r i h t e s  
Sample Size  Sample  %  of  AQL  Number  of  Defects 
Code  Size  Lot  Accept  Rej  ect 
(Adapted  fran MIL-STD  105D,  Table  11-B) 
... 
Table N 
Reduced Inspection  by A t t r i h t e s  
Sample Size  Sample  %  of  AQL  Ncrm ber of  Defects   
Code  Size  Lot  (%)  Accept  Reject 
(Adapted fran MIL-STD  lOSD,  Tahle 1 1 4 )   * 
Tahle V 
Sample Size Code  Letter for 
Sampling by Variables 
Lot  Size  Code Letter  Lot  Size  Code  Letter 
- 
C  801  1,300  K 
- 
D  1,301  3,200  L 
E  3,200-  8,000  M 
- 
F  8,001 -  22,000  N 
G  22,001 - 110,000  0 
H  110,001 - 550,000  P 
Q 
I  550,001  over 
J 
(Adapted fran MIL-,SD  414,  Table A-2) 
Table VI 
Normal  and  Tightened  Inspection by  Variables 
- 
Variability Unknown  AQL  1% 
Sample size  Sample  K value 
Code Lett-er  Size  Normal  Ins~eciot n  ~i~ hte ned  Inspect ion 
(Pdapted ran MIL-STD  414,  Table B-1)  % 
-  Table VII 
Reduced  Inspect ion by Variables 
- 
Variability Unknown  AQL  13 
Sample  Size  Sample 
Code Letter  Size  K Value 
C  4  1-34 
D  4  1-34 
E  4  1-34 
F .   4  1.34 
G  5  1.40 
H  7  1-50 
I  10  1.58 
J  10  1-58 
K  15  1-65 
L  .20  1-69 
M  20  1-69 
N  25  1.72 
0  30  1-73 
P  50  1-80 
.-.   Q  75  1.84 
Table V X I  
Values of T for Tightened  Inspection 
Sample Size  Number  of Lots  sample' Size  Number  of  Lots 
Code Letter  5  10  15  Code  Letter  5  10  15 
(Adapted fran MIL-STD  414,  Table B-6)  Table  M 
Limits of  Estimated Lot Percent 
Defective for Reduced  Inspection 
Sample  Size  Number of  Lots  Sample  Size  Number  of Lots 
Code  Letter  S  10  15  Code  Letter  5  10  15 
* 
The  estimated lot percent defective must  be  zero for the 
number of  consecutive lots indicated  in parenthesis. 
(Adapted ran MIL-STD  414,  Table B-7)      TABLE x  --Continued 
Table for Eatimathg the tdt Percent Defective Using Standard Deviation Method  APPENDIX  B 
P?CCEZ!XES  FGR  LAGOMTOR'I'  CO!.i?LIANCE  TEST iNG OF 
t i I G H - - I I ! i T  iGi?CLJI'\Y  \!/?.PO!? .C!SGi/?\RGE LAislPS  The  pur;lose  of t!li s  docurnel~t;.i  s  to es tab: i sh  proced:rts  for lab~~-;toc~oryn pl i ant? 
testi!ly  of  high-intensity  a-ercury vapor  disc!i;rge  lamps  that  are  certified by  tI-,e 
mani:f;lctul-er  as  in  co~:i!i~ al ncc vii tli  appropriate standarl;ls.  High-intensi ty nwrcwy 
vapor  discharge  1ati:ps  are  tes tc.d  f ~ crom pl i a c e  with  the  Performance  Stand;ird  -kit 
f.lel-cu~-yV  ap~rL amps  pu!)lished  i!i  21  CFR  1010 and  21  CFZ  1040.30  and  as  anenazd. 
The  piwedi~rcsd escribed  in  this  docu!i!ent  arc applicable  to any  high-in tenr;i ty 
rrcl-cury  vapor  discharge  lar~lp that  is designed,  inter?dc;j, or promoted  for  il7uxi11~- 
tior;  purposes:  Definitions  of  tct-ms  used  in  this  docut:;c.t~t are  identical  to  defjn-i--  . 
tions  publislied  in  21  CFR  Parts  1000  through  1040. 
C 
P tR  FWl ALL  0PCRAT;ONS  W ITIl  E XTREbiE  CARE.  ULTRAVIO LET  RAJ1 AT1 Oi4, 
.  ELECTRICAI.  SHOCK.  IXRCURY  VAPOR, OZONE,  AND  GLASS  FRI.G!%i:TS  ARE  ALL 
iiAZARDS  INliERENT  W IT11  THESE  TESTS. 
GCNERfiL  INSTRUCTIONS 
1.  Labo raiory  control  of hig  h-i n tensi ly nlercury  vapor  di scharge  (I11 U)  1a mp  san;p?es  * 
. 
shall  be  maintained  as  speci fied in  the  FDA  ~egual t ory  Procedui-es  Manual , i!>e 
Analyst  Gui da:ice  f-ianual , and  the  Corupl i ance  Program  7394.804C  " Co~ilpil  sr~cc. 
-Testing of  Mercury  Vapor  Laqx  and Sunlati~pP  roducts  a t  NEAC". 
2.:  Upoti  notification of  assignn~ento :  an  HID lamp  san~plef or analysis  the  analyst 
shall  a,-range rri th  the Saslpl e  Cus todi an  to  transfer  the  saniple- to  the  tes'ii ng 
1 sbora to t-1. 
3.  A1 1.  test data  shall  be  recorded  on  Analyst Worksheets  (FD-431  andJ-D-431s)  and 
appropri at.e  spzci a1  data sheets. 
- 
4:  The  sa111plc nu~xbers t~111b e  acqui red  from  the  "Offi ci a1  Seal"  (fonn FD-415a)  on 
the  satllple  and  verified with  the  "Collection  Report"  (forni FD-464)  and  be 
clearly printed .on  all WOI-kshcets. If no  "Official  Seal"  is present  on  the 
S~II1I e~ I,  consul t your Supervisor. 
, ' wi ti) Chapter  9  of  the  Analgs t  Cper~ticnsE lanuai. 
t 
Cautim  shzll  be  taken  in-li;ridling  H I D  ?amps. 
I-kasui-e~~itc no f  extin5uishi ng  tine  for HI  .!I ;a mps  shall  be  car;-i ed  out  accordi r:g 
to  the  pt-occdu:-.?s outlined  in  Appendix  A  "Testing  Procedures  -for i.icasure::::-lnt 
of  thc  Extin~;!ishiny Tim of  Sel f-Extinyuishing  High-l ntcnsi ;'y  Fei-cur)/  Vapor 
Dischaqe  Lalips". 
A1 1  acco:n!~ariyir:y maieri al;  shall  be  mad  and  uriclcrs tood  before  any  testi!:! 
procedures  are  ini tis ted.  Consul t your  Supervi sol- if  any  problais  sri: 
encoun tel-cc! wi ti1  the niatet-i a1 s. 
COMFLI r4CE  TEST1 NG 
The  con!yliance  tests  delineated  ill  this  part  are perfomed  on  a17  HID  lsmps 
col lected  ioi-  analysis  at GlEAC  under  Cornpli ance  Prograri;  7394. CO4.E. 
Labels.  l.larninas.  and  Idcintificatior~s 
A.  Labels 
Iclentification Lakling 
a.  Visually  examine  the  iden ti fication  label  for (a) presence, 
(b) permanence,  (c) legi bi 1 i ty , and  (d)  accessi bi 1i t y. 
b.  Record  the nam?  of  the nianilfacturer  of  the  lanp  and  the  month 
and year of  manufacture!  as  nlar-ked  on  the  lamp,  inscribing  tags, 
. 
or labels,  or on  the  lamp  packaging. 
- 
c.  Visually  examine  the  outer envelope  of  the  lanip  and  other parts 
of  the  lamp  thzt idill  be  visible  after the auter en\telcpe  of  the 
1a mp  is broken  or renioved.  for eit he)- the. required  "T"  or "R"  1a bel 
as  required under either 1040.30(d) (2)  or 1040: 3O(e) (1). 
Larnp  Packaging  Labeling  . 
a.  Visually exar~iine" T"  labelled  1a111pp ackairig  and  verify  that  the 
packagi ngs  clearly and  prominently  di spl ay , as  required  under  . 
. 
1040.30(d)(3)(  i i ):   _ 
- 
"This  lanip  sliould  sel f-extinguisli  within  15 liiintues 
after the outer envelope  i s  broken- or putlctured.  I f 
-  -  . such  darnage  occurs,  TUlW  OFF  NdD  REMOVE  LAI.!P  t o a void 
possililc  in jury  from  hazardous  shortwave  ul traviolct 
radiation." 
or the  same  quot~tiori\ ~thi  the  rcnioval  of  the- phrase  "or prrrictur-ed " 
- 
from  tlic  firs t  sentence  for a  1 all$) nlanufa~tu~-codn   or bcfoi-e  b.  Vi sudl iy exa111i11'"eR "  1;ll)el led  lamp  packagi n?  ar,d  veri fy  iha t  the 
-  - 
packagi ncjs  clearly and  p;-oi!ii~~ely~ idt i spicy , ;IS  t-q:lirc> undc.1- 
lO43.3O(e) (2) ( ii ): .. 
"\-!AR'lli.IG:  This  l a p  can  cause  serious  skin burn  6nci 
eye  inflmmation  from  sho!-tmv?  ul travi olet  radiztic~-  
if outer envclcpe  of  the  lm:;?  is broken  or punctwed. 
Do  not  us?  where  people wi 11  reniain  for- moi-e  than  a 
.few minutes  unless  adaquate  s!lielding ct- cther szfcty  . 
precautions  are used.  Lainps  that wi 11  automatically  . 
extinguish ru.hen  the  ouier envelope  is broken  or 
punctured  are cotr:~~c?i-cilsyl  avai lablt?." 
01- the  same  quotation vri th  the  ren:oval  of  the  phrase  "or punctured" 
from  the  last sentence  for a  lari~p~  i;dnt.~fsctirresdr!  or before 
September  7,  1981  and/or  a slight wordin9  varia'iisn  cancel-ning 
connierci a1  avai 1a bi 1i  ty. 
3.  C~I-tificationL abeling 
a.  Visual ly  examine  the  certi'fication  label,  as  required  undnr 
1010.2  for*:  (a) presence,  (b) pel-nmence,  (c)  legi bi 1i  ty , 
. 
and  (d) accessi bi 1 i ty.  . 
B.  Lamp  Advc-)-tis emen t 
._ 
- -  I 
1.  Visually  exanline  all  "R"  lab~lledla mp  advertisings,  if' submitted with 
the  sample,  for promine~itlyd  i spl aying  the  full owing  v!ordi ng , as requi m d  
. 
-* 
.  under  1040.30(e)(3): 
"WARIJIi4G:  This  lamp  can  cause  serious  skin  burn  xi1 
eye  inflanriiation  from  shortwave  ultraviolet  radiation 
-.  if outcr envelope  of  the  1a mp  is broken  or punctured. 
Do  not  use  where  people wi 11  rehain  for n:ol-e  than  a 
few  iuinutcs  unless  adcquate  shielding or other safety 
pr-ecautior~sa  re used.  Lamps  tha.t wi 1l   slutoni~tcia  l ly 
extinguish when  the  outer envelope  rs  broken  or punctured 
are eomr~~rcilayl  svai lable." 
-. 
 .. j  or the  saw quotation with  the  removal  of  the phrase  "or punctcred" 
from  the  last sentence  for a  lamp  manufactured on  or. before 
September  7,  1981 and/or  a  slight wording  variation  contcrnirig 
conmerc~ial availability. 
. 
1  Photographi c or other appi-opri a te  reproductive  method  may- be  used. 
.  - 
2.  Docu~ilentation of  the  following  is required: 
a.  For  all HID 'lamps 
(1)  full  vim of  the  lamp  b.  Fzt-  "I?"  lsbcllcd  1ariq;s: 
(1)  The  "R"  lab21  on  the  outcr envelope. 
(2)  The  "R"  lahe1  un  the other part  of  t l i ~la r!i!> that  is visible  . 
after the outkr envelcpc  of  the  1~wpi z  l:roke~i 01-  rmovcd 
if  the  "H"  label  is :lot  visible cn  the  intact  lac-?. 
!3)  TI:?  "I;".  label  c;l  t!ie  la111pp ,:cksging. 
(Docu~nent:i tem  ( 2 )  throur~l;(  6) only  i f  origins1 n;a-tei-!;l  is not 
subn;i tte2.) 
c.  For  "T"  l;b?lled  lamps: 
(1 )  The  "T"  lsbc? on  the outer envelope. 
(2)  The  "T"  label  on  tlieotiicr pcri of  the  131iip that  is visib12' 
after the cuter cnvelope  of  thi!  lanip  is bi-&en  01- removed. 
(3)  The  "T"  label  on  the .lamp.packayiq if  the  original  rnstcrial 
is not  submitted. 
(4)  The  "This  Imp  . . . . radiatio:~" vordiq on  the  larcp  pacl:qit?cj' 
if the  original  material  is not  submitted. 
(5)  Full  view  of  the  lanip moimted  in  the test stand  afixr 
extSriguisliaSi1ity  testing.  Particul~i-a ttention  c!i;;ll  be  ma& 
to document  that complete  breskage  or rer~ioval of  tile outer 
envelope  (wi tti  the cxception  of  Pri!gno~i.i.s extsndi:y  50  mi 1l i - 
meters  or less  fl-o:n  thc  base  she1 1) was  zcc~m[~lishcd. 
(6)  View  of  the lamp  con:ponent(s)  employed  to cause  the  lamp  to 
extinguish. 
3.  Docwents tion techniques  showing  c~nib'nations of  the  above  s h ~ u.Jl  be 
used wlienewr  possible.  A1 1 docunmtation must  brt  proper1 y nnurtted 
and  clearly  Isbclled. 
111.  S Ef~  E  xtinguishing Testing 
A.  lkasui-cwnt of  the  Exti ngui s-hi r, g  Time. of  Scl i-Estingui shi ng  141 9 Lamps 
1.  Only  lamp  samples  identified by  the  ni~11ufactu1-ears   certified  meet 
tcj 
the requireli~etrs~  of  l040.3O(d) (1 )  shall  be  tested. 
2.  A1 1  testing shall. bc  co~iductcda  s descril~edi n  Appendix  A  "Proccdurcs 
for Ikasuri~?gt he  Extinguishing  Tinie  of  Sei f-Extinguishing Hi 911-Intensi ty 
. 
I4ercury  Vapor  Di  schargc  Laalps" 
- 
3.  r!oii fy your  Supervisor  in  the  event  that the outcr ~rivel&2 is not 
broken  or rer~loved as  specified  under  lO40.3O(d).  These  tcs ti ng  procedwcs  arc  for a1 1 HID laaips  certi fi eci  by  the man:f:l.cturer 
. 
. 
to com?ly  i-~tih  21  CFli  !O40.3O(d) (1 ) 
These  test proccdurcs  shall  be  performed  only  by  an~lystss pecially  trained 
in HID  lamp  testing. 
A1 1 testing shall  be  perfamed  it1  the \.IEAC  1110 la:i!;~ testing  chsrnber. 
Appendix  C  provides  a  detailed  descriptio:~o f  the  tcsting chambe:-.  , 
A11  testing shall  he  perfomled  using  the IEAC  HID lamp  testing  stznd. 
Appendix  8  provides  a detailed description  of  the  test iny stand. 
Any  HID lam designed  to be  operated  only  in  a specific fixture 01-  Iuminaire 
that  the  lamp  mancfircturer speci fies shall  be  tested  i ti  that  fix tzrc  or 
. 
1u ~n1i 12i  1.e 
Extrerxe  caution  shall  be  taken  in  handlicg  the 1110  lamps.  Larys  si~ouIdo nly 
be  hancilcd  by  thei r base  she1 1.  Gloves  shall  be  worn  ehexver hsndlir,? tti? 
glass cnvelope(s) of  the  lamps. 
Perfom a1 1 operations with extreme  care  due  to  the  hazards  of  u1 traviolet 
radi; tion,  electr-i cal  shock,  mercury  vapoi-,  ozon2,  and  glass  fragn~ects 
inherent with  these  tests. 
TEST I NG PROCEDURES 
1  Iiisei-t  the  lamp  in  the NEAC  HID lamp  testing stand located inside of  the 
- ;  GJEAC  HID testing chamber.  The  lamp  is to be  orientated as spcci -?i ed  for 
use  by  the nianufacturer.  If  the manufacturer  has  not  sperified a  particulzi- 
orientation  the  lariip  shall  be  orientated bil-s e  up  01-  as  specified by  BRH.  . 
2.  The  test  stand  shall  be adjusted  appropriately  for the  HID 1a1;1pt hat  is 
bei ng  tes ted. 
- .  
3.  Close  the  chamber  door and  turn on  the \.!ARNING 'light .. 
4.  Turn  on  the  tinrr an'd  set the  control  panel  of  the  timer. 
5.  Open  the  co~iipresseda  ir tank  and  set the  i-egulatol- to  125 psi. 
. 
- 
-  -  6.  Record  the  test  cha~nbert enlpcratu1-e.  I f   the  ten~pei-ature is not' in  the 
L 
rang?  of  25  1: ~ O C ,n otify your Supervisor-. 
- 
-  7.  Adjust  the  reference ballast  to  propc~-'irr:peds,lcef or testicg  t!ie  1a:lli).  Sct 
the  voltage  for tcs';<ny  the  1wp at thc  value  indicated  or r.cc~iit:i:cncicd by 
the  r~:~!~uf~ctufroei:. - tile  operation  of  the intact  1salp.  Chc-cl:  to i-nsure thr;.t 
t.he  curr3nt is in  the  proper  I-sncje.  Reco;-d the set tirlgs  and  valxcs  of  thb 
refet-ccce  bal ?ast. 
8.  S tartthe 1~ li:p by  sv!itc!iing  01; the ball as t- to-lamp  pc.:+21- supply  swi i21. 
Record  the tiric  at which  the lariip  is started. 
. 
9.  Operate  the lanip  fcr fifteen  (IS) minutes. 
.1 0.  Swi tcli  on  the  "Law?  Grcaker" swi tch. 
' 
. 
11.  Record  tlic  rtadi ng  sIio;.;n  on  :.!re  tinier.  I f  mre than  twenty  (20) minutes' 
have  elapsed a d  the  t i w r  has  not  displd~eda   time  reading,  check  to  see  if 
tne  lai~pi s sti 11  operating by  looking  thrclugh  the  filter win do;.^.  Switch 
off  thc ba11ast  to  Ism;,  power  si~pplys wi ich  aid record  the  tin2  2nd the timer 
t-eadi ~?g. 
12.'  Turn  of?  thz  "Lamp  nresker"  switch. 
.^ 
-  I -13.  Wait  fifteen  (15) minutes  and  repeat  s t c ~ s8,   9,  acd  11. 
14.  Turn  oil  the  testing chamber cxhaust sr.!i  tch. 
Do  not enter t!ie  testing  chs~i~beurn til  lxo  (2) ntinutes  have  elapsed  since 
swi tctiirig  cn  the exlxiu~tV CII'C  S W t~ch  . 
Veri-i'y'tt~zt there  a\-c  no  fragnmts  of  glass extending  50 nm  or mo:-e  fro:n 
. 
the  base  slic? 1  Pliotogl-sph  the broken  HI U  lawp whi le i t  is s ti l 1 in  the 
test stand.  !f  g l x s  fragrrlents  extending 50 rrun  or more  are  fo~md,n otify 
your Super-visor. 
. 
Verify  th.:!  czucc! of  the  l a p  outacjc. 
~areful?y   removc  tile  remaining  1a mp  cospcnents  from  the  testing stand. 
- 
Repcat  steps 1-7. 
Repeat  step 10. 
Repcat  steps  14  and  16. 
Repeat  step 8. 
Repeat  step 11. 
Verify  the  cause  of  the outage. 
Rc[;r?a;  s'tep 18..  - 
' 
- 
- 
. -  APPENDIX  A  (Cont'd) 
,- 
c 
26.  Turn c f f  t!le  cocpressed  zir supply,  the  time,-,  a!ld  ttie ICA!?>!Il:(;  l i ~ h t .  
27.  Dispose of  a11  broken  glass  and  br9i:cr.  HID 1~1i!psi n  the  pro;;er  cor-rtei~icrs. 
28.  Return  any  untested  lamps  to the  sample  custodian.  APPEND1 X  B 
NEAC HI D  LNlP  TESTIPIG  STAND 
. . 
The  H!G  I m p  brea!:er  was  fabricated by  the  Facility Maintc.nance Section  of  the 
Winches tei- Engineering  and  Analytical  Center  (b!EAC).  The  lamp  envelope  brecker 
test stand  providcs  a  means  to hold  a11  lanip  sizes, except  the  119F3,  T-9'5,  55  inch 
tub?  type.  The  test stand consists of  a  steel  rod  structure wi t11  lamina teri  pfienol ic  
beard  c ~ dpa nels,  as  show  in  Figure  I .   The  stand ~neasures 24  inches  by  13  inches. 
Ot~ee nd  of  the stand has  a  12  inch  diameter hole  in  tile  center to allox the  broken 
glass cnvelope  to  fall  into a  catch  container housed  in  a  table  that  the  stand is 
'," 
posi timed on,  as  shorn  i n  Figure  11.  The  stand  consists of  three  pairs  of  steel 
rods,  24  inches  long.  Each  pair of  rod;  is used  as  rails on  Fdli~ha n  adjustable 
' 
clet~lb racket  ridc.s.  The  bracket,  as  shown  in  Figures  IIIa,  b,  c, measures  4  by 
5  inches.  Two  slots allovi  the  air c;~linder, which  is n:ounted  on  the bracket,  to  be 
positioned  so  that the air cylinders  rod  penetrates  the  lantp's  outer envelope  by 
' 
3/16".  The  bracket  further adjusts  so  that the angle  thzt the  penetrating  cyliadsr 
rod  strikes the  lanip's  envelope  can  be  preset  to the  1a nip 
enve 1 cp? ' s  surface  .  This  adjust~enta llows  for   onf figurations  which  n-tinimize 
defic.ctions that would  result  in  failure of  the  cylindzr  rods  to succcssfu?ly rupture 
the evcnlope. 
Thrce  steel  rods  are  located  i n  bettrec!? the  rod  pairs.  These  three  rods  are used 
to t!old  steel  stops  that keep  large  lsinps  from being -pushed aside  rather than 
penetrated  by  the  cylinder  rods. 
+'.& 
The  thrce  air cylinders are operated by  a compressed  air supply.  The  conipl-essed 
air supply  supulies air a t  125 psi.  The  air is held  by  s  solenoid valve.  1Jhm 
the  switch  is closed  the  solenoid opens  allowing  the  cofipressed  air to  flax  through 
a  manifold which  supplies  the  air to each  of  the  three  cylinders simultaneously. 
The  air prcssui-c  delivery system  is shown  in  Figure  IV.  Each  of  the  cylinders 
respond  by  projecting  its rod  the  full  1" throw.  the  air pressure  i n  the  cylinders 
-  is then  relieved when  the  first solenoid  closes and  a  second  solenoid o,.?ns.  Thc  - 
loss  of  air pressure  causes  the  cylinder rods  to retracl by  means  of  internal 
springs.  Thus,  instantaneous breakage  of  the outer envelope  is achieved.  The 
closing of  tlie switch  that opens  the  first solenoid also starts tlie  electronic 
tinier.  .  A  tnp-100  photodiode  is located  i n  back  of  the 'observation wSndov~.  \.lhcn 
the  lamp  extinguishcs,  the photodiode  circuit closes,  allowing  5  volts  to be  supplied 
to  thc  timer.  This  signal  tenuinates  the  timer  and  the  interval  T-or which  the  lanip 
was  opzrating  after the outer envelope iqas  removed  is displayed. 
Fi gurc. V  shows  the universal'  lamp  socket  ttia t a1 lows  for the  1 amp' to be  removed  fran 
thc  test  stznd after breakage.  By  loosening  the socket's  clamp  the  lamp  base  is 
,freed fl-ol!~t he socket.  Thus.  the  problem  of  unscrewi'ng a  lamp  that has  had  its   :.
outer envelope  rmiaved  is eliminated.  Two  such  sockets  have  been  fabricated.  Orle 
for nieai urn  and  adwedi u111 bases  and  a second  for nlogal  bases.  The  test stand  it sel f 
can  be  positioricd  on  the  test stand  table such  that lamps  can  be  operated  in either 
base  up,  b ~ s edo wn ,' or horizontal , as  shov:n  i n  Figures  VI  and  VI I.  . 
/ 
-. ' Figure I 
HID lamp  breaker 
Figure -I 1 
Catch- container 
1  Figure IIIa 
Air cyl inder bracket 
Figure IIIb. 
Adjustment slots 
Figure IIIc 
Adjusted air cylinder 
-  Figure  I V  
A i r  Pressure  Delivery 
Sys tern 
Figure  V 
Uni versa1  Lamp  Sockets  Figure  V I  
Horizontal  Breaker  position 
- 
Figure  VII 
-~&rtical( Base. up) 
position 
..   APPEN DIX   C 
WEAC  HID LMlP  TESTING  CHAMBER 
The WEAC  HID testing chamber.(Figure  I) i s  5  feet square  and  7  feet high.  The  back 
wall  i s  cement  block  and one  side wall  i s  5/8" plasterboard.  The  ceiling and  re- 
maining walls  are  114"  plywood.  The  two  plywood walls  are  adjacent  to each  other. 
A  hollow core  paneled door  3  feet wide  by  6!j  feet high i s  located i n  one  of the 
plywood walls.  A  12 inch square window  i s  located i n  the other plywood wall.  The 
window  opening has  a 12 inch square  piece of UF-3  ultraviolet absorbing  plastic 
permanently mounted on  the interior side of the wall  (Figure  11).  On  the outside 
of the wall  there are  two  sliding frames  i n  a track  so  that either or nei ther frame 
' can be positioned in front of the plastic window.  One  frame  holds  a 12  inch square 
piece of welders  f i l t e r  shade  i12 glass  and the  other holds  a 12 inch square  piece 
welders  f i l t e r  shade  $8 glass  (Figure 111).  AC  power,  120 volts,  i s  supplied into 
the  chamber,  two  of the  outlets can  be switched from outside  the  chamber.  A 
. 
squirrel  cage  fan  is mounted on  the laboratory bui lding roof and  i s  ducted into the 
ceiling of the  testing chamber.  When  a lamp  i s  being tested a WARNING  1i ght i s  
swi tched on  outside the testing chamber entrance  door.  Figure  I 
HID Testing  Chamber  - 
Figure  I1 
UF-3  UV  absorbing  plastic 
Figure  I I1 
- .  
Welder's  filter