The Thai Industrial Standards Institute (TISI) has proposed to withdraw TIS 4 Part 1 - 2529(1986) Incandescent lamps, and replace it with TIS 4 Part 1 - 25xx Tungsten filament lamps for domestics and similar lighting purpose Part 1 safety specification as a mandatory standard.
This draft standard specifies the safety and interchangeability requirements of tungsten filament incandescent lamps for general lighting service having:
- rated wattage up to and including 200 W;
- rated voltage of 50 V to 250 V inclusive;
- bulbs of the A, B, C, G, M, P, PS, PAR or R shapes, or other bulb shapes where the lamps are intended to serve the same purpose as lamps with the foregoing bulb shapes;
- bulbs with all kinds of finishes;
- caps B15d, B22d, E12, E14, E17, E27 or E27/51×39.
As far as is reasonably practicable, this standard is also applicable to lamps with bulbs and caps other than those mentioned above, but which serve the same purpose.