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Fluxism

Best size of light?

Hi all,

I'll be upgrading the growroom soon, by adding a bigger light & larger NFT tank.

The grow room measures 0.8m wide x 1.5m deep x 2.4 high.

But, would I be better off going for another 250w ballast lamp (matching the current 1 I have). Or would getting say a single 600w + setup be better?

Flux.

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Id go for the 600 watt ive read somewhere that 600 is the most economical light per watt

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Economical maybe... But woulsnt the fact that you had 2 250w lights spread further part = better coverage that a single sauce light?

Flux.

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id say whichever distributes the most lumens per foot is best.

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600 is better. Sounds odd but one source can give better coverage because you dont need to get the plants as close to the bulb.

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and the 600 will penetrate much deeper into the canopy than the 2 250's

npk

Edited by NPK

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A 600W gives off about 20 lumens per watt more than a 400W or even a 1000W.

Not sure about lumen per watt with a 250W though.

Wilbur

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the more powerful the light, the deeper the penetration.... however, if you have more than one light, the light would hit from different angles. sounds better, but i would think it would be less efficient.

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a 600 gives off about 3 times as much lumens as 3 250s. a lot cheaper than 3 250s too, intial cost and electricity and replacement bulbs. if you have a 250 already keep it to start the plants off on

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come to think of it... 250W WHAT? haha

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but a 250w system would be good for growing like 3-5 plants in a 3'6'' x 2' 2'' x 5'4'' area right?

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but a 250w system would be good for growing like 3-5 plants in a 3'6'' x 2' 2'' x 5'4'' area right?

A 250W would give you 31W per sq/ft and a 400W would give you 50W which is preferable, but hotter.

Wilbur

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You use what light your space can handle

a 250w 2500 lumens output

a 150w 1600 lumens output

at 6 inc from cannapy

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