I use 2x48'' flourescent 20 watts just turn off before going into the room, All the way veg/flowering
litespeed Reviewed by litespeed on . UVA-B Questions I have 600, 1200 and 2000W UVA-B bulbs. (hps type not the flourescent) which is the most suitable bulb for a 18 Sqft area? (I have 2 X 400hps) At what stage of flowering should I use it? All the way or last few weeks? In flowering period, how long should it be on daily? Whats the suggested distance between those lamps and the plants? Rating: 5