ive been using 10 or 15 watt sprial flor. 6700k daylight bulbs in my 5 hex's grows about anything with problems. even grew aromtaica in 1 and grew slow but good, didnt die!
heres a pic of a 7g hex with 2 10w spiral bulbs in it. they plants grew fine although it was very packed, no ferts, just eco complete.
