G/TBT/N/THA/3 24 
Explanatory Memorandum  
 
Draft Ministerial Regulation   
Definitions of  high e fficien cy single -capped f luorescent  lamps  
B.E. …  
 
 
Principle  
Definition of the energy consumption efficiency of high e fficien cy single -capped 
fluorescent  lamps  from local manufacturers and sellers  
 
Rationale  
In accord ance with Section 6 and Section  23, Clause  1(2) of the Energy Conservation 
Promotion Act, B.E. 2535, with amendments made  to the Energy Conservation Promotion Act 
(Issue 2), B.E. 2550 , on the conservation  of energy in machine ry and equipment , and on the 
promot ion of  the us e of energy -efficient material and equipment, the Minister of Energy  – with the 
guidance of the National Energy Policy Committee  – shall  issue a ministerial regulation , in which 
it is deemed appropriate and necessary to define  a single -capped fluorescent lamp  with an  
energy consumption efficiency value not lower  than as specified in this ministerial regulation  as a 
high efficien cy single -capped fluorescent  lamp . This will h elp the conserv ation of energy and 
promote the us e of energy -efficient  materials . It will provide  the manufacturers and sellers of such 
products  with the right to support and assistance from the Energy Conservation Promotion Fund. 
It will encourage and promote the  manufac ture and sale of these products and  allow  consumers 
to use energy economically and efficiently  by being able to  choose high efficien cy single -capped 
fluorescent lamp s. This will promot e the country’s energy consumption efficiency and reduc e 
pollution.-2- 
DRAFT  
Ministerial Regulation  
Definitions of  high e fficien cy single -capped fluorescent lamps   
B.E. … 
-----------------------------------  
In accordance with S ection 6 and Section 23, Clause  1(2) of the Energy Conservation 
Promotion Act, B.E. 2535, with amen dments made to the Energy Conservation Promotion Act 
(Issue 2), B.E. 2550  contain ing a number of provisions related to the limitation of private rights 
and liberties as permitted in Section 29, together with Section 33, Section 41 and Section 43 of 
the Con stitution  of the Kingdom of Thailand  – with the  guidance  of the National Energy Policy 
Committee  – the Minister of Energy  issues a  ministerial regulation as follows:  
 
1. In th is ministerial regulation:  
“Single -capped fluorescent lamp”  means a lamp that has  one holder  for us e with an 
external circuit  that contains an internal or an external starter . 
 “Colo ur temperature ” means the temperature of a black  body  giving the same colour  
temperature  as the lamp . For example, a ‘daylight ’ fluorescent  lamp  has a colour temperature  of 
approximately 6  500 Kelvin , while a ‘warm-white ’ type has a colour temperature of approximately  
2 700 Kelvin.  
"Energy consumption efficiency value ” means the energy consumption efficiency of a 
single -capped fluorescent lamp . 
“Manufacturer ” means an enterprise  that produces or assembles single -capped 
fluorescent lamps , either  locally or  abroad.  
“Seller ” means an ent erprise that  sells single -capped fluorescent lamps locally , where  the 
products are  either produced locally or abroad.  
 -3- 
2. A high efficien cy single -capped fluorescent lamp must  have  energy consumption 
efficiency no t lower  than the value specified in the  following table : 
 
Shape: Twin Lamp  
Advanced energy consumption efficiency value 
(lumen s per watt)  Specified wattage  
(watt s) 
T  4400 K  T > 4400 K  
5 47 – 55 47 – 55 
7 58 – 65 58 – 65 
9 65 – 70 62 – 65 
11 76 - 80 70 - 75 
 
Shape: Double Twin Lamp  
Advanced energy consumption efficiency value 
(lumen s per watt)  Specified wattage  
(watt s) 
T  4400 K  T > 4400 K  
10 57 – 65 57 – 65 
13 65 – 70 65 – 70 
18 69 – 75 65 – 70 
26 65 - 70 57 – 65 
 
In order to promote  energy con servation , the minister shall  review these definitions of 
energy consumption efficiency at least once every five years, taking into consider ation  the 
economic situa tion, the government’s energy polic y, the readiness of manufactur e and sales, as 
well as  support and assistance given to the manufacturers and sellers of  single -capped 
fluorescent lamp s. 
3. The formula  for calcul ating the  energy consumption efficiency valu e of a single -capped 
fluorescent lamp  is as follows:  
Initial energy consumption efficiency value (lumen s per watt) =       Initial Lumen s 
                                                                                                                 Initia l Electric Power  -4- 
4. The test for  find ing the energy consumption efficiency value of a single -capped 
fluorescent lamp  must be carried out by the organi sations specified and announced by the 
minister.  
5. The standard and methodology of the test  for determining the energy consumption 
efficiency value of a single -capped fluorescent lamp  must comply with the specifi cations as 
published by the minister in the Government Gazette.  
6. This ministerial regulation  is effective from the da te on which it  appea rs in the Official  
Gazette.  
 
Given on:    
Minister of Energy