Is a 1000w 2.5x hotter than a 400w?

J

jakesnake

Active Member

• Dec 3, 2011

• #1

Is the heat output equal to the watt for HPS lights?

600w is 150% hotter than 400w?

1000w is 250% hotter than 400w?

 

growmo23

Active Member

• Dec 4, 2011

• #2

Wow. I dunno, but I want to. Subbing this in case someone out there smarter than me can break it down for us! Overall, if heat is an issue, get a cooled hood IMHO.

 

*BUDS

Well-Known Member

• Dec 4, 2011

• #3

jakesnake said:

Is the heat output equal to the watt for HPS lights?

600w is 150% hotter than 400w?

1000w is 250% hotter than 400w?

Click to expand...

of course not thats crazy. The 1000 is about 15-20% warmer, eg the 400 runs at 25 and the 1000 runs at 30

 

supchaka

Well-Known Member

• Dec 4, 2011

• #4

First time I ran a 1k was in a walk in closet with no air cooling. That closet was in the 90's with the door open, them bitches will get hot if you let them!

 

laserbrn

Well-Known Member

• Dec 4, 2011

• #5

That depends on you definition of "hot".

Lets say that ambient temperature is 75 degrees. A 400w light may run at 100 degrees. 25 degrees above ambient. A 1000w light may run at 137.50 which is 67.5 degrees above ambient temperature.

I made these numbers up, but you see what I'm getting at. The bulb doesn't have to be twice as hot to give you twice the problem.

 

J

jakesnake

Active Member

• Dec 4, 2011

• #6

So I can use the heat gain from the 400w to calculate (roughly but close) the temp rise I'd get form a 600w or 1000w?

 

J

jakesnake

Active Member

• Dec 4, 2011

• #7

bump

how can I calculate the temp rise I'd get going from a 400w to a 1000w hps?

If I'm rising 2.5F over ambient now, with a 400w. And a 1000w is 2.5x more heat -- then I should only see ~6.3 rise with the 1000w?


I can't return it, so I want to get it right...

 

laserbrn

Well-Known Member

• Dec 4, 2011

• #8

I'm going to guess you will get a lot more heat than 6.3 degrees from the 1kw. Get a dimmable ballast and make your life easier.

 

dannyboy602

Well-Known Member

• Dec 4, 2011

• #9

if you're growing in a closet or another closed space consider led. no heat. period.