rather than adding the damsels, just let the live rock start the cycle, when you add the live rock the ammonia from it will be more than enough. unless you run the UGF in reverse they will just trap crap under the gravel that you will have an extremely hard time getting out and will cause problems later on, personally i'd just ditch them and use the rock for your bio filter and a good protien skimmer for mechanical filtration and enough powerheads to get over 10x turnover rate so that you can eliminate dead spots in the live rock. an 8200k light would work for corals, but you will have a very hard time finding corals that will survive under NO lighting unless you've got several bulbs over the tank, corals can be grown under light anywhere between 6500k and 20,000k(although growth is slower under 20,000k) but they need lots of that light.