The Thai Industrial Standard TIS 2337-2557 specifies energy efficiency requirements for tubular fluorescent lamp ballasts for general lighting purposes, and includes the following:
Minimum energy efficiency of tubular fluorescent lamps ballast;
Ferromagnetic or electronic ballasts are used for tubular fluorescent lamps, such as 10w-70w, voltage 220/230 V and 240 V, at frequencies of 50 Hz; ballasts are used as separate components or built-in lamps.
The standard was enforced in August 16, 2017.