The question is interesting to me as well, what is the best LED light for seedling?
I'm thinking to build a custom seedling light, about a 90W power draw from the wall, with the following LEDs;
420-430nm 3 led,
445-455nm 7 led,
460-465nm 7 led,
470-475nm 5 led,
6000K 10 led,
3000K 5 piece of...