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05-30-2005, 04:00 PM #2
Senior Member
1000w hps???
The rule of thumb for lighting is 50 watts per square foot of growing space (floor space), it can be a little less though. A 1000w lamp will cover an area of 5 feet x 5 feet (maximum). An area of 4 x 4 is good. The amount of plants depends on how big you want to grow them. You can grow them bigger than 1 foot under a 1000w lamp. The plants double or even triple in size by the time they've finished flowering, so if you flower them at 2 feet tall, they'll be about 4 - 5 feet at maturity. This depends on the strain though. Your electricity bill will increase a fair bit. It won't be too bad if you're only using the 1000w lamp for flowering because you'll only be running it for 12 hours a day. If you use it for vegetative growth where it will be running for at least 18 hours a day then your electricity bill will increase significantly. It's best to veg under fluorescent lights and just use the HPS for flowering.
good luck.
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