i do not know how to elect lights but check out black dog and advance lighting, examples,,,,(I personally like the Amare), it just needs some more ommff, but for the coverage, its great, but notice the price on all of these, Amare uses better COBS, https://www.amaretechnologies.com/collections/solarecilipse Plus, the smaller, the good companies use Epistar, I think, also USA. They (except Amare (they use 3090's CXA), watch the whole series of videos, so you can really understand, buy a cheap chinese one and replace with CREE and/or epistar, or everything and use as a veg light (Chinese). So advances, using 16 XLM-2, replaces XLM (no 1 but . ..) and the price, $1600+ with tax, the lights from cree, if you bought, $159.20 at 9.95 each, then some epistars...I may get those and some high end $100 ones, depending on most efficient and also had a 1100 HPS and a KIND XL 1000 which to my surprise is showing up many places as #1 as its full spectrum, 4x4 and really does work, as does AMARE, KIND http://hydrobuilder.com/kind-k5-100...SFUPXLd4I8Q85yDjHE3Ic_AJOmqePmOBu4hoCwnfw_wcB You can set it to come on slow like the sunand go off slow, like the sun, and here are CREE, DO A SEARCH ON DIY KITS CREE Here is one,,,, http://www.ledsupply.com/cree-leds http://hydrobuilder.com/kind-k5-100...SFUPXLd4I8Q85yDjHE3Ic_AJOmqePmOBu4hoCwnfw_wcB Using XMl2 and CXA3090 respectively. http://imgur.com/a/YiTzF Also here is Amare, tell them Franke sent you and you'll probably get a discount. Talk with Victor, just say your a friend as I might get some round ones just to add as side lighting. 3 Weeks in TENT VEG, 4 weeks VEGGING in ROOM, 11 WEEKS FlOWER, and 35 days of flush, I saw, 8 600 watt HPS and only a few but 7 FEET TALL trees and he got quite a bit, the build using the HIGHEST END CREES where I gave a link, or somewhere, I will find it, there is one that got 3.5 kilos in a 4x8 room, tall is good, start with small cup, go bigger slowly, then, final is a 7 GALLON pot, like him, I do 1 foot per gallon, What are your thoughts on lighting? You would think KIND would have software updates or a community where we can download schedules, automatically, vs programming AMARE https://www.amaretechnologies.com/pages/spectral-composition If you go to this place in LA, I can get you deal there too, I got the kind for $1400 when it was $2000, so they are coming down, but it gives the best resins and, also look into UVB/UVA supplemental lighting. Peace I am building something if it beats a HPS at lower or same watts (STILL LESS HEAT), I will let you know, strains, airflow, humidity, all factors, and those are a tad~!!!