FINAL DRAFT UGANDA 
STANDARD  
  FDUS 904 -1  
First Edition  
2011 -mm-dd 
 
 
 Reference number  
FDUS 904 -1:2011 
© UNBS 2011   
  
Performance o f electrical lighting equ ipment  — Ballasts for 
fluorescent lam ps — Part 1: Energy  labeling and minimum 
energy pe rformance standards requirements  
 FDUS 904 -1:2011  
ii © UNBS 201 1 – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Ugan da Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2011  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any  
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of St andards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: 256 41 4 505 995  
Fax: 256 41 4 286 123  
E-mail: unbs@infocom.co.ug  
Web: www.unbs.go.ug  
 FDUS 904 -1:2011  
© UNBS 2011  – All rights reserved  iii 
  
Contents  
Foreword  ................................ ................................ ................................ ................................ ...................... iv 
1 Scope  ................................ ................................ ................................ ................................ ................ 1 
2 Application ................................ ................................ ................................ ................................ ........ 1 
3 Normative references  ................................ ................................ ................................ ....................... 1 
4 Terms and definitions  ................................ ................................ ................................ ...................... 2 
5 Energy Efficiency Index (EEI) classification and labelling  ................................ ............................. 2 
5.1 Determination of corrected total input power ( Ptot.cor. ) ................................ ................................ ....2 
5.1.1  Number of samples  ................................ ................................ ................................ .......................... 2 
5.1.2  Determination of ballast e fficiency  ................................ ................................ ................................ ..2 
5.2 Determination of average corrected total input power  ................................ ................................ ...4 
5.3 Determination of EEI classification  ................................ ................................ ................................ .4 
5.3.1  Classification tables  ................................ ................................ ................................ ......................... 4 
5.3.2  Additional requirements for A1 classification ................................ ................................ ................. 4 
5.4 Labeling of EEI  ................................ ................................ ................................ ................................ .4 
6 Performance requirements  ................................ ................................ ................................ .............. 4 
6.1 General ................................ ................................ ................................ ................................ .............. 4 
6.2 Performance prerequisites  ................................ ................................ ................................ .............. 4 
6.3 BLF declaration  ................................ ................................ ................................ ................................ 5 
6.4 Minimum Energy Performance Standards (MEPS)  ................................ ................................ ......... 5 
7 Application and test result formats  ................................ ................................ ................................ .5 
7.1 Application for registration for MEPS ................................ ................................ .............................. 5 
7.1.1  Registration  ................................ ................................ ................................ ................................ ......5 
7.1.2  Report format ................................ ................................ ................................ ................................ ....5 
7.2 Holding of records  ................................ ................................ ................................ ............................ 5 
7.2.1  General ................................ ................................ ................................ ................................ .............. 5 
7.2.2  Test report  ................................ ................................ ................................ ................................ ........ 5 
7.2.3  Availability  ................................ ................................ ................................ ................................ ........ 6 
 FDUS 904 -1:2011  
iv © UNBS 201 1 – All rights reserved  
 Foreword  
Uganda National Bureau  of Standards (UNBS) is a parastatal under the Ministry of Tourism, Trade and 
Industry established under Cap 327 , of the Laws of Uganda.  UNBS is mandated to co -ordinate the 
elaboration of standards and is  
(a) a member of International Organisation for Standa rdisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT/SPS Agreements of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through  Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of representatives of 
consumers, traders, academicians, manufacturers, government and other stakeholders.  
Draft Uganda Standards ad opted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standard s Council.  
Committee membership  
The following organizations were represented on the Energy Management  Technical Committee , UNBS/TC 
13, during the development of this standard:  
 Department of Mechanical Engineering, Makerere University  
 Econoler  
 Electricity R egulatory Authority (ERA)  
 GTZ-Promotion of Renewable Energy and Energy Efficiency Programme (GTZ -PREEEP)  
 Ministry of Energy and Mineral Development  
 Private Sector Foundation Uganda (PSFU)  
 Uganda Manufacturers’ Association (UMA)  
 Uganda National Bureau of St andards (UNBS)  
 Water and Electricity Consumers’ Association (WECA)  
 
The following organizations were represented on the Lighting Appliances Sub -committee of the Energy 
Management Technical Committee,  UNBS/TC 13, during the development of this standard:  
 Centre for Research in Energy and Energy Conservation (CREEC), Makerere University  
 Department of Electrical Engineering, Makerere University  
 Econoler   
 Industrial Technical Solutions (ITS) (U) Ltd  
 Kiboko Enterprise (U) Ltd  
 Ministry of Works and Transport  
 Osra m/Dembe Trading Co. Ltd  
 Uganda National Bureau of Standards (UNBS)  
 Uganda National Chamber of Commerce and Industry (UNCCI)  
 Ultra -Tec Uganda Ltd  FINAL DRAFT UGANDA STANDARD  FDUS 904 -1:2011  
 
© UNBS 2011 – All rights reserved  1 
 Performance of electrical lighting equipment — Ballasts for 
fluorescent lamps — Part 1: Energy label ling and m inimum 
energy performance standards requirements  
1 Scope  
This Uganda Standard specifies requirements for the classification of ballasts for a range of fluorescent lamp 
types (refer to Tables 1 to 3) according to their Energy Efficiency Index (EEI) and the form o f label ing of the 
EEI, which is generally shown on the ballast rating plate.  
This Standard also specifies the Minimum Energy Performance Standards (MEPS) requirements for certain 
fluorescent lamp ballasts.  
The ballasts covered by this standard are th e ferromagnetic or electronic type, that are used with fluorescent 
lamps with a rated lamp power from 10 W to 70 W, for use on 50 Hz supplies of 230/240/250 V or a range 
which includes one or more of these voltages.  
This standard covers ballasts that are s upplied as separate components or as part of a luminaire.  
This standard does not cover the following ballast -lamp combinations:  
a) primarily for use on d.c. supply or batteries ; 
b) primarily for the production of light outside the visible spectrum, that is,  400 nm to 800 nm ; and  
c) hazardous area lighting equipment . 
2 Application  
This standard provides a classification and energy labeling scheme for ballasts for fluorescent lamps and in 
addition defines MEPS requirements. This standard shall be used together  with U S 904-2. 
3 Normative references  
The following referenced documents are indispensable for the application of this document. For dated 
references, only the edition cited applies. For undated references, the latest edition of the referenced 
document (includin g any amendments) applies.  
US 904-2, Performance of electrical lighting equipment — Ballasts for fluorescent lamps  — Method of  
measurement to determine energy consumption and performance of ballast -lamp circuits  
US IEC 60921 , Ballasts for tubular fluoresce nt lamps — Performance requirements  
IEC 60929 , Auxiliaries for lamps —A.C. supplied electronic ballasts for tubular fluorescent lamps — 
Performance requirements  
IEC 61231 , International lamp coding system (ILCOS)  FDUS 904 -1:201 1 
2 © UNBS 2011  – All rights reserved  
 IEC 61241 (all parts) , Electrical apparatus for use in the presence of combustible dust  
4 Terms and definitions  
For the purposes of this standard, the t erms and definitions given in US 904 -2 and the following apply.  
4.1 
Energy Efficiency Index (EEI) classification  
alphanumeric indicator (dimensionle ss) related to the corrected total input power of a ballast -lamp circuit 
under test, ranging from A (most efficient) to D (least efficient)  
4.2 
Minimum Energy Performance Standards (MEPS)  
maximum permitted corrected total input power of a ballast -lamp circ uit specified in this standard  
4.3 
supplier  
for products manufactured in Uganda ‘supplier’ means the manufacturer or, where a completed product is 
manufactured for exclusive supply to a second agent, the second agent may be identified as the supplier. For 
products manufactured outside Uganda  ‘supplier’ means manufacturer’s local agent or importer, having an 
address in the country (s) where the product is sold (Uganda ). 
4.4 
total input power  
total power supplied (in watts) to the ballast -lamp circuit measured  at the test voltage  
4.5 
corrected total input power  
total input power in watts of the ballast lamp circuit under test corrected to comparable reference conditions  
5 Energy Efficiency Index (EEI) classification and labelling  
5.1 Determination of corrected total input power ( Ptot.cor. ) 
5.1.1 Number of samples  
At least one ballast shall be tested in accordance with US 904-2. At the supplier’s  discretion, more than one 
ballast may be tested to verify performance and demonstrate increased confidence of conforma nce of the 
product to this standard.  
The corrected total input power shall be determined for each ballast as specified in  5.1.2.  
5.1.2 Determination of ballast efficiency  
5.1.2.1  Where required, measure the light output in lumens and total circuit power wi th a test  ballast and 
the reference lamp. Repeat the above measurement with a reference ballast and the same  reference lamp. 
The BLF is defined as the ratio of the light output of the test system (test  ballast/ reference lamp combination) 
to the light outp ut of the reference system (reference  ballast/ reference lamp combination). (Expressed as BLF 
= 1.00 when they are equal).  
 
where  FDUS 904 -1:2011  
© UNBS 2011  – All rights reserved  3 
 Ltest is the measured light output , in lumens , of the reference lamp when connected to the test ballast ; and 
Lref. is the mea sured light output , in lumens , of the reference lamp when connected to the reference 
ballast  
5.1.2.2  Where the ballast performance parameters have been determined in accordance with US 904-2 
Annex C, the corrected total input power of a ballast -lamp circui t shall be determined from Equation 2.  
NOTE  Applies to all ballasts excluding mains frequency ferromagnetic ballasts with two wire connection and with an 
external starter. These are covered in 5.1.2 .3. 
 
 
where, 
Prated is the rated lamp or typical HF power  in watts of the relevant reference lamp according to lamp 
data sheet  
Pref. is the measured lamp power in watts with the reference ballast  
Ptot.cor . is the total input power in watts of the ballast -lamp circuit under test corrected to comparable 
reference conditions  
Ptot. test is the total input power in watts of the ballast -lamp circuit with reference lamp and test ballast  
5.1.2.3  Where the ballast performance parameters have been determined in accordance with  US 904-2 
Annex E, the corrected total input po wer of a ballast -lamp circuit shall be determined from Equation 3.  
NOTE Applies only to mains frequency ferromagnetic ballasts with two -wire connection and  with an external starter.  
 
 
where, 
Prated is the rated lamp or typical HF power in watts of relevan t reference lamp  according to the lamp 
data sheet  
Pref. is the measured lamp power in watts with the reference ballast  
Ptest is the measured lamp power in watts with the test ballast  
Ptot.cor . is the total input power in watts of the ballast lamp circuit u nder test corrected to comparable 
 reference conditions  
Ptot.test is the measured total input power in watts into the ballast -lamp circuit under  test 
NOTE Information from CELMA indicates that the ferromagnetic ballasts are typically  manufactured to operat e the 
lamps at approximately BLF of 0.95. The factor 0.95 is used since it  is being applied in Europe for ferromagnetic ballasts.  FDUS 904 -1:201 1 
4 © UNBS 2011  – All rights reserved  
 5.2 Determination of average corrected total input power  
Where more than one ballast is tested in accordance with US 904-2 the determined  values of corrected total 
input power shall be averaged and the average shall not be  rounded.  
5.3 Determination of EEI classification  
5.3.1 Classification tables  
The EEI classification shall be obtained from tables 1 to 3 (as applicable) for t he particular  lamp type 
arrangement and rated power, using the value for average corrected total input  power determined in 
accordance with 5.1 and 5.2.  
5.3.2 Additional requirements for A1 classification  
A ballast marked with classification EEI=A1 shall co mply with the following additional  requirements:  
a) the ballast shall be dimmable.  
b) corrected total input power at rated voltage shall not exceed the value specified in  tables 1 to 3 (as 
applicable), Column A1.  
c) total input power at 25  % light output shall not exceed 50  % of the value specified in  tables 1 to 3 (as 
applicable), Column A1.  
d) the ballast shall be capable of dimming the lamp to 10  % light output.  Items (c) and (d) shall  be 
confirmed by testing.  
5.4 Labeling  of EEI  
Ballasts  subject to MEPS shall be l abeled legibly with the EEI classification and in the  appropriate form, for 
example: ‘EEI = A3’. The EEI classification may be used on a  voluntary basis for other fluorescent lamp 
ballasts outside the scope of MEPS .  
6 Performance requirements  
6.1 General  
The performance criteria set out in 6.2 to 6.4 shall be met by each individual unit  tested, where applicable, for 
the fluorescent lamp ballast model to comply with this  standard.  
6.2 Performance prerequisites  
This standard does not specify safety requireme nts that are contained in separate standards and regulations.  
Fluorescent lamp ballasts within the scope of MEPS (refer to 6.4) and those that use the EEI energy 
classification and labelling scheme on a voluntary basis shall conform to Clause 5 in this standard and to the 
following standards:  
a) ferromagnetic ballasts : US IEC 60921 ; and  
b) electronic ballasts: IEC 60929.  FDUS 904 -1:2011  
© UNBS 2011  – All rights reserved  5 
 6.3 BLF declaration  
A ballast shall be provided with a declaration of its BLF for each of its recommended  ballast -lamp 
combinations.  
6.4 Minimum  Energy Performance Standards (MEPS)  
A ballast that is used with ILCOS lamp type FD (type T) lamps listed in Tables 1 to 3, shall  comply with the 
following requirements as appropriate:  
a) For ferromagnetic ballasts with a minimum rated voltage ≥  250 V  — Corre cted total input power shall 
be less than or equal to the EEI value for B2 as  specified in Table 1.  
b) For ferromagnetic ballasts with a minimum rated voltage ≥  240 V and <  250 V  — Corrected total input 
power shall be less than or equal to the EEI value for B 2 as specified in Table 2.  
c) For all other ballasts  — Corrected total input power shall be less than or equal to the EEI value for B2 
as specified in Table 3.  
Ballasts that are intended for use with ILCOS lamp types FD, FSD, or FSS compact 4 tube  flat (type T, type 
TC-L or type TC -F lamps) listed in Table 3, or that may be used with  those lamps, shall comply with the 
requirements for an EEI classification of B1.  
7 Application and test result formats  
7.1 Application for registration for MEPS  
7.1.1 Registratio n 
An application for registration of the ballast brand and model shall be submitted to the  relevant regulatory 
authority in the format shown in Appendix A of this Standard.  
Applications generated electronically with all the data in a similar layout will al so be  accepted by the relevant 
regulatory authority.  
To register, contact the relevant State regulatory authority.  
7.1.2 Report format  
A repor t in the form of Annex G of US 904-2 for each model tested shall  accompany the MEPS registration 
application.  
7.2 Holding of records  
7.2.1 General  
Where a ballast carries an EEI rating but is not covered within the scope of 7.1, the  manufacturer or importer 
of the ballasts shall comply with 7.2.2 and 7.2.3.  
7.2.2 Test report  
A report in the form of Annex G of US 904-2 for each model tested shall be held  by the supplier and made 
available to the relevant regulatory authority upon request.  FDUS 904 -1:201 1 
6 © UNBS 2011  – All rights reserved  
 7.2.3 Availability  
Records shall be retained until at least five years after the last date of manufacture or  import, whichever is 
applicable.  
  
 
 
 
NOTE 1 Refer to lamp coding system (ILCOS).  
NOTE 2  Applies only to mains frequency ferromagnetic ballasts with two -wire connection and with an external starter.  
 
 
 
NOTE  1 Refer to International lamp coding system (ILCOS).  
NOTE  2 Applies on ly to mains frequency ferromagnetic ballasts with two -wire connection and with an external starter.  
* Nominal values shown may have different rated values. Refer to the relevant lamp data sheet.  FDUS 904 -1:2011  
© UNBS 2011  – All rights reserved  7 
 † Refer  to 5.3.2.  
 
 
NOTE   Refer to IEC 61231, International lamp coding system (ILCOS)  FDUS 904 -1:201 1 
8 © UNBS 2011  – All rights reserved  
 * Nominal values shown may have different rated values. Refer to the relevant lamp data sheet.† Refer  to 5.3.2 . FDUS 904 -1:2011  
© UNBS 2011  – All rights reserved  9 
 Annex A 
(normative)  
 
Notification of energy performance chara cteristics  
This annex gives the information required for an application for registration  or renewal of registration of 
ballasts for fluorescent lamps for energy efficiency  determination.  
NOTE Sections 2 to 6 are also ‘the prescribed form’ that the Uganda  Energy Efficiency  (Energy Using Products) 
Regulations 200 2 require manufacturers and importers to complete  and submit in respect of ballasts for fluorescent lamps.  
Section 1 Application details  
I hereby apply for registration of fluorescent ballast(s) for the purpose of energy  efficiency determination 
pursuant t o the ............................................................................  
(specify the regulation under which this application is made)  
in the State/Territory of ..................................................................  
(specify the /Stat e/Territory in which this application is made)  
Section 2 Details of manufacturer /importer  
Name:   
Company name:   
Company address:   
 
 
Contact person:  
(A name, address  and contact details  for a person in  
Uganda shall be  provided)  Name:  
Address:  
Position/title:  
Telephone:  
Facsimile:  
E-mail:  
 
Section 3 Description of equipment  
Is the application for a single model  or a family of models?  
(indicate correct answer)  Single  
 
Family  
Brand name:   
Model name: (if available)   
Model number or family n umber:   
Other model numbers to be  covered by this registration:   
Country of manufacture:   FDUS 904 -1:201 1 
10 © UNBS 2011  – All rights reserved  
 Where is this product to be sold?  
(indicate correct answer)  Uganda  
 
Other specify  
Year in which model first available  in Uganda   
Is the date of manufacture  perm anently marked on the 
rating  plate in a non -encrypted format?  
(indicate correct answer)   
Yes/No  
If the date of manufacture is permanently marked on the 
rating  plate in a non -encrypted format  provide a description 
of the date  format   
If the date of manufa cture IS NOT  permanently marked on 
the rating  plate in a non -encrypted format,  provide details 
of how to determine  (from the serial number or other  
permanent markings for this model)  whether the date of 
manufacture  was either:  
a) in the 5 year period prior  to the introduction of MEPS; 
or 
b) in the 5 year period  subsequent to the  introduction of 
MEPS  
NOTE Only one of the options a) or b) is  required   
Does this model or family replace  or supplement another 
with the  same performance?  
(indicate correct answer)   
Yes/No  
If yes, indicate relevant details  Model name  Model number  Registration no.  
 
Section 4 Testing and test repo rt 
Is a test report attached?  
(indicate correct answer)  Yes/No  
If no test report is attached note the  source 
registration number of the  appliance upon which 
this application relies for its test report:  
(Proceed to Section 5 if no report attached)   
Test laboratory type:  
(indicate correct answer)  Own ‘in -house’ laboratory  
Independent laboratory  
Test laboratory name:   
 
Test laboratory addre ss  
 
 
Test laboratory location:  
(indicate correct answer)  Uganda  
Other -please specify  
Test laboratory accreditation:   
Application to standard  
(indicate correct answer)  US 904-1 
Other -please specify  
Test standard used:  
(indicate correct answer)  US 904-2 
Other -please specify  FDUS 904 -1:2011  
© UNBS 2011  – All rights reserved  11 
 Test voltage (V)   
Reference lamp details  Rated lamp power (W):  
Test report number(s) and date(s):   
 
Section 5 Specific Equipment Details  
Ballast type  
(indicate correct answer)  Electronic  
 
Ferromagnetic  
 
Starter type  
(indicate  correct answer)  None  
Rapid  
Instant  
External  
Ballast rated voltage (or voltage range)   
Is the ballast part of an imported luminaire ? 
(indicate correct answer)  Yes/No  
If the ballast is part of an imported  luminaire state 
the details and  marking of the lu minaire  Brand:  
Model:  
Other identifiers:  
 
 
Method of test  
(indicate correct answer)  
 Annex C US 904-2 
Annex E US 904-2 
 FDUS 904 -1:201 1 
12 © UNBS 2011  – All rights reserved  
 Test results  
 
 
Energy Efficiency Index Classification  
 
 
Minimum Energy Performance Declaration  
 
Performance Prerequisites Dec laration  
 FDUS 904 -1:2011  
© UNBS 2011  – All rights reserved  13 
 BLF Declaration  
 
 
Section 6 Declaration  
I declare that the details stated above are true and correct in accordance with the requirements  of US 904-1 
Signature: ................................................................................... ............. Date: .................................  
 
 
 FDUS 904 -1:201  
© UNBS 2011 – All rights reserved  15 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Cert ification Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification mark sc heme of the Uganda National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau o f Standards.  
 
 FDUS 904 -1:201 1   
 
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