I am new to this forum and to flashlight mods(never done this at all). Iapologize if this has been asked and answered but I can't find the answer. I am looking for any books or instructions on moding flashlights. I am interested in making super bright green and red led lights for hog and varmint hunting. I want a long throw version with little spill and another version with long throw but more spill to better locate eyes. I was hoping there was some reading material to give me a clue about led emitters, drivers, batteries, etc. I appreciate any help.