Well sometime in the near future I will be building a new light. Just because I'd like to expand and these lights are showing to perform very very well. For you HID guys they emit around 127lm/W. With the CREE 3070 there are a couple different bins. The two top bins are the most difficult to find. The best being the AB bin and the next the Z4. Then there is Z2 and YB(lowest). Z2s are still good but Z4 is what i plan on working with. LEDS: Look around either Mouser or digikey. Z4's run about $45-50/ea and Z2s around $40. example- here are the Z2 3000k diodes. http://www.mouser.com/ProductDetail/Cree-Inc/CXA3070-0000-000N00Z230F/?qs=sGAEpiMZZMu4Prknbu83y0bObCPMgyC%2fl6eQby5L%2fDGQDb9TViwpOg%3d%3d Z4 3000k http://www.digikey.com/product-detail/en/CXA3070-0000-000N00Z430H/CXA3070-0000-000N00Z430H-ND/4437209 I will be using constant non-dimming drivers @ 1400mA http://www.ebay.com/itm/50-W-Watt-High-Power-LED-Driver-AC90V-265V-50-60HZ-Waterproof-/311054139120? Or.... If you want to tie in multiple lights to one driver you could use something like these Mean wells. http://www.mouser.com/ProductDetail/Mean-Well/HLG-185H-C700B/?qs=sGAEpiMZZMvV8Y9YugmIgmy193Qkqm18MYy3MuBDghw%3d and Artic alpine11 heatsinks and fans. (92mm) http://www.newegg.com/Product/Product.aspx?Item=N82E16835186070&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-CPU+Fans+%26+Heatsinks-_-N82E16835186070&gclid=CjwKEAjw456hBRDQ4eqg8MzA2W0SJABI2gJ8IpijiAEk2MxC-ChFTDH28CNtf1IVuaXZZeVFQyQNPhoCctLw_wcB If you do individual units you will need one of each per fixture- 1. CXA 3070 1. driver 1. heatsink with fan If you used something like the mean well driver you could just due multiple lamps per driver but is actual more money, though you have the reassurance in the mean well name I guess. Doing individual means more flexibility with modules via switch board. You could even us a mix of other color temps or even mono chromes on the same heat sink to give more options for a full spectrum full cycle light. examples: one of SLsupras lamps. So to give you an idea I will be making something similar to these. So keep your eyes peeled. This will be coming in the near future.