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 are acquired by
Toyota. Even one supplier from Japan came to summit the bids but they failed also.
For example : Now Tsusho buy 900 bht/tube for TUBE LAMP FLUORESCENT
LED 1.2 meters, 300 tubes/shipment. Don’t' know selling price to Toyota.