Question

If I have a 5000 btu air conditioner in a 15 x 10 room do I really need a light fan for a 1000w hps

A light fan? A fan for cooling your bulb?

Yes for a cool tube 1000w dimmable ballest

Markbarnett said:

Yes for a cool tube 1000w dimmable ballest

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A single 1000 light in a 4x8 will generate 3.41 BTUs of heat per watt. =3410 BTUs per hour. 5k is pushing it

What if I run the light at 75% since im only going to have like 8 plants

Markbarnett said:

What if I run the light at 75% since im only going to have like 8 plants

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Besides light spectrum shift and under power early fail. Should reduce heat slightly.

Will come down to air exchange IMO.

Bro, it's up to you how many . 1 K don't have a huge footprint any way. A 10x 15 is like 6-8 raptor hoods and 6-8k to get down. My dude had 16k in same size before.

Well I want to take it and make 2 rooms one for clones mothers and veg and the other for flower

Markbarnett said:

Well I want to take it and make 2 rooms one for clones mothers and veg and the other for flower

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That's a good idea. You gonna build it or tent it?

Build it... Use cfl for veg room and my hps for my flower

Markbarnett said:

Build it... Use cfl for veg room and my hps for my flower

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Sounds like a plan. Keep us posted.

I have this homemade hood and it has 3 of these bulbs in it

Markbarnett said:

I have this homemade hood and it has 3 of these bulbs in it

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Real crafty.