read above for your lighting time question. they'll need more light than that 100w. 2 per plant would be good, for now. they make y splitters you can use 2 make 2 sockets out of one. hang 1 y fitting(with 2 bulbs) over each plant. you'll need more cfls as you go. the closer the better... 1-2". use water with ph between 6.2-6.8. no nutes for the first month.....your using a cfl? whatever the light, leave it on 24 hours during veg. what are the details of your grow? soil, lights, strain, etc?
Hrmm looks like an ordinary housefly to me, try posting in the marijuana plant problems forum under bugs, should get some better help there. Be aware that tin foil(unlike Mylar) sometimes creates Hot spots.no one knows?