lighting

[ryansmall24]

I have a 12 foot by seven foot room im starting how and i want to grow twelve plants in there how many high pressure lights do i need and can i grow more plants in there then twelve.

 

[Jericho]

You have 84 square Ft. You need 5000 lumen's per square foot (That is said to be the growers minimum to Flower). 1000W HPS gives out 130k lumen's - 140k lumen's per square foot.

84 x 5000 = 420,000 Lumen's

You would need 3 1000w Hps lights in there if my math is right.

3 x 130 = 390
3 x 140 = 420

Depends on the type of bulb and ballast. lumen's go down after some use, so you will probably need a 600w backing them up to keep you above the 5000 lumen mark

You would probably want to split the room in two, a flowering and veg room. Would save you a little on electric that way.

 

[zem]

you most certainly can do more plants BUT number of plants doesnt mean bigger yield, yield is related to lumens

 

[flaboy88]

I have a 12 foot by seven foot room im starting how and i want to grow twelve plants in there how many high pressure lights do i need and can i grow more plants in there then twelve.

i agree wit zem... its not how many plants.. its your lighting.. you wont pull from the plant (in grams) more than the number of watts you run..for instance.. 1k=1000g's but thats if your gettin a 1 to 1 ratio.. its not that easy to obtain it.. and i agree wit jericho that you would need 3 1k lights to get your 3000 lumens for veg and 5000 for flower

 

[hugs4nuggs420]

Split that grow room into a veg and flower room man it will make life easier. Buy either some floros like some T-5's, or an MH system for your vegging room and a few HPS system for your flowering room.