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Your regular update for technical and industry information

Thailand: Industrial product standard for tungsten filament lamps for domestic and similar lighting purposes


On 27 December 2019, the Thai Ministry of Industry issued Announcement No. 5507, 2019 to approve TIS 4 Prat 1 which specifies requirements of safety and interchangeability for general-use tungsten filament incandescent lamps. The products scope includes:

  • 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 and
  • caps B15d, B22d, E12, E14, E17, E27 or E27/51×39.

Additionally, terms and definitions, references, general requirements and conditions for marking/labeling and testing associated with these regulated products are mentioned in the standard.

Learn more about Thai Government Official Gazette No. 136/316D, 27.12.2019 here.

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