Thinking of switching from cfls to 400w HPS

texashustle

texashustle

Active Member
Ok so I have a heat issue. Thats why Im using cfls but when I have 10 cfls in a tent thast are 3 inches away from the plants, isnt that hot too? Im thinking if I buy a 400w hps and keep it 12-18 inches away (I think thats right) I can use my fans to blow the hot air from the plants? Or maybe make my own cool tube?

Any help here from guys with experience?
 
High Time 420

High Time 420

Well-Known Member
Hps is miles better but you need propper ventilation, you can touch a cfl bulb so its not too hot. if you have heat troubles now dont get the hps.
 
MrFishy

MrFishy

Well-Known Member
Do you know your lights out temp? What kind of exhaust is available?
I thought cfls allowed closer than 3"?
 
texashustle

texashustle

Active Member
MrFishy said:
Do you know your lights out temp? What kind of exhaust is available?
I thought cfls allowed closer than 3"?
Click to expand...
Lights out is 70-76 depending on room temp. I'll buy whatever exhaust I need. They can be but I keep them around 3 inches. I use reflectors and they are everywhere lol so its hard to see.
 
DubsFan

DubsFan

Well-Known Member
texashustle said:
HUH? Dont get what you said?
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Lack of puncuation is why that's hard to read.

I have buddies with 1000w HPS less than a foot away during veg. For flower it's over a foot. You can touch the glass of the cool tubes when they're on. That's how cool they run. If you have a 400w HPS without a cool tube it will put off a lot of heat.
 
texashustle

texashustle

Active Member
DubsFan said:
Lack of puncuation is why that's hard to read.

I have buddies with 1000w HPS less than a foot away during veg. For flower it's over a foot. You can touch the glass of the cool tubes when they're on. That's how cool they run. If you have a 400w HPS without a cool tube it will put off a lot of heat.
Click to expand...

Cool thats what I need then. 400 watt hps and homemade cool tube. Any ideas fro a cheap powerful fan?
 
DubsFan

DubsFan

Well-Known Member
Photos of your grow room will help us point you in the right direction. I would just buy a fan from Walmart.
 
punkrockdave

punkrockdave

Active Member
hey man i just switched form cfl to the 400w next gen system from DiscountHydro.com
I love it, I have had no problems with heat, it actually seems to keep the room a little cooler
than the cfls, I did have a shitload of them so, anyway, I dont think you'll have any problem, I'm using the same fan
just a standard small household fan on the plants
 
texashustle

texashustle

Active Member
DubsFan said:
Photos of your grow room will help us point you in the right direction. I would just buy a fan from Walmart.
Click to expand...
Its a 2x3x6 foot tent in my closet. Pics are hard to take as its in the corner. What kind of fan from walmart? I dont see any there that move real air.
 
texashustle

texashustle

Active Member
punkrockdave said:
hey man i just switched form cfl to the 400w next gen system from DiscountHydro.com
I love it, I have had no problems with heat, it actually seems to keep the room a little cooler
than the cfls, I did have a shitload of them so, anyway, I dont think you'll have any problem, I'm using the same fan
just a standard small household fan on the plants
Click to expand...
Is it a cool tube system? What same fan? Thanks
 
High Time 420

High Time 420

Well-Known Member
Your temps will go well over 90+ with lights on inside that tent, a fan blowing over the tops will not be enough.

You WILL need and inline extraction fan sucking heat from the bulb and some other type of fan sucking cool fresh air in, little cheap fans will not help, pay the extra and get some propper ventilation going on inside you tent.
 
MrFishy

MrFishy

Well-Known Member
It'd help a lot if you could get your lights out temp down to around 60-65.

Plants expect a 10*-15* drop when the lights are out, IMO. Cooler nights also may increase thc production.
I'm running 2 600hps about a foot away from the canopies, w/oscillating fan sweeping across the vegetation. Temps 60*-75* . . . but also have a high ceiling in bud room.
Obviously you'll need to suck the hot air out of the top of your tent somehow.
Good luck.
 
texashustle

texashustle

Active Member
MrFishy said:
It'd help a lot if you could get your lights out temp down to around 60-65.

Plants expect a 10*-15* drop when the lights are out, IMO. Cooler nights also may increase thc production.
I'm running 2 600hps about a foot away from the canopies, w/oscillating fan sweeping across the vegetation. Temps 60*-75* . . . but also have a high ceiling in bud room.
Obviously you'll need to suck the hot air out of the top of your tent somehow.
Good luck.
Click to expand...
how do you keep your inside temps 60-65? Extra ac unit?
 
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