What are the requirements of the LED street lamp chip? How big is it? How many will it take and how big is the distance between them?
To single words, whatever you want a few watts, is generally the number of beads multiples of 7. A single chip is usually 45U, specifically you want what brand, the price is not the same.
Do you want integration or single kernel? Integration, you have 10W, 20W, 30W, 50W, 70W, 100W (single).
