They buy from brand KPT, TAIWAN for selling TOYOTA. For this brand they
have their factory in Thailand. Toyota need to use Led tubes from KPT only.
Toyota asked KPT to sell to Tsusho because Tsusho is the one of Toyota
Group. Easy to get the material code. There were specification locked by
Toyota. Even one supplier from Japan came
to summit the bids but they failed also. For example : Tsusho buy 900 bht/tube
for TUBE LAMP FLUORESCENT LED 1.2 meters, 300 tubes/shipment