Quote Originally Posted by psypro
i know that i can use just 1 single 600 HPS for flowering but i thought that if i use 2 x 600 i would propably go for more yield.

is it better go for 2 metters x 2 metters x 2 metters tall with this amount of light to get more yield ?? or would i still get same yield with smaller place since each plant will attract more lumens.??

best regards
The general rule is 1 sq meter for 1000Watts. With the 600's, you can stretch it a bit...but definitely not more than 2 square meters. You need quality light for the plants. I have 20 plants under my 2 600 Watts HPS. They are in 3 gallon buckets (12 Ltr). Before flowering they take 4 to 6 weeks in the veg room, and they are about 1 to 1 1/2 ft tall when they go into flowering. They stay in flowering for 7-8 weeks. It doesn't matter whether you have 20 plants in 12 liter pots or 40 plants in 6 or 8 liter pots that are smaller, your yield does not depend on HOW MANY plants you have, but rather how good of an environment you make for them. The tops of all plants should be within 30 cm of the light.