Flouresant's

[Pedro]

i just noticed that in my work they sell flouresant light's very very cheap and i wanted to know if using flouresants to flower 6 plants..how much watt's of flouresant light would i need.....

it's £3 for a 38w


any help would be great

Cheers

[Brain Fart]

I beleive you need at least 1500 - 1800 lumens? More would most definately not hurt. Pot loves light. :-)

[Pedro]

do you know how many lumens come from a 38w flouresant light

[InferiorWang]

Originally Posted by Brain Fart

I beleive you need at least 1500 - 1800 lumens? More would most definately not hurt. Pot loves light. :-)

You really want more than that.

from elsewhere:

Current theory holds that the minimum amount of lighting needed to sustain growth is around 2000 lumens per square foot. Mid range is around 5000 lumens per square foot. Optimal is 7000-7500, or higher, lumens per square foot.

I know someone growing a hindu kush plant with a single 1800 lumen cfl, but it's not growing incredibly fast.

For people that want to figure watts/sq ft instead of lumens/sq ft, you want about 50w/sq ft for good lighting with HID lights, and IIRC closer to 75 w/sq ft with for good lighting with fluorescents to compensate for the lower efficiency. Remember, watts measure how much electricity you are using, not how much light is produced.