----this means potential cost for failure lights in future.
2, LED Chips Brand:
----Compared to LEDs made in China Mainland, cost of LEDs from CREE, Samsung, Seoul, Epistar, Bridgelux etc will have much higher cost. 3, Driver:
----We only use drivers from professional driver manufacturer, it cost much higher than many other suppliers who is using drivers by their own. 4, Real lamp power:
----When we are saying 10W, it is often 12W, but some competitors are saying 10W for a lamp that have only 7W. It is certainly that our 12W will cost much higher than 7W. 5, Packing method:
----A good packing will cost much higher than an awful packing.