How much ceiling height do you have? You need to adjust the light height as the plants grow up to 4-5ft tall or more. Plus, there's heat control issues...in the summer time. You need to stay at 70-85 degrees at the top of the plants.

I would recommend only two 1000 watt lights: until you get your growing system/growing knowledge; worked out...IMO.

If you wanted 18 flowering females...you might have to veg 30 or more seedlings...(unless you use clones or fem seeds)...and separate the males.

I grew 13 females with one 400 watt HID light, in a closet once...but, that another story...:stoned:
Dutch Pimp Reviewed by Dutch Pimp on . What light system for few large plants? We are about to grow 18 plants under cal prop 215 with 3 recommendations, well within the law, but have never grown before. I've been reading about light requirements the last few weeks and taken in tons of info. However, we have a large space for growing, approximately 10' by 20', which seems huge for only 18 plants. Is it possible to grow very large plants indoors to maximize yield?Based on square footage seems we'd need to run 8 x 1000's, but that seems ridiculous for only 18 plants. I guess Rating: 5