If you want some advise on growing with LEd then maybe look at my post.

Led grow log testing the Pro-Grow 260

I think making your own led lights will be more costly and less effective than the pro led light makers.

I havent bloomed with this light yet but the veg stage is awesome.

Bloom will be coming in the next few days. Ill give the plants 36 hours of darkness to trigger the bloom hormone and get them moving quicker.

Check it out on this site or here: LED LOGGER

I don't know how far along you are with making your own LED lights but I would love to see them in action if you can post something.

Thanks

Take care