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Growing With HID All About HID Lighting.


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  #1 (permalink)  
Old 05-08-2008, 02:38 PM
Ziggy87
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Default HPS for a small cabinet

I was wondering would a 100 watt hps work for a flowering cabinet grow that is 24 in x 10 in? Would it produce too much heat? And how far must the light be from the plant? The closet is only about 3 feet tall so I know that the tops of the plants will probably hit the roof, and I don't want them to get burned. Right now I'm using cfl's but was thinking of changing to get the better lumens: watts, and for light penetration.
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Old 05-08-2008, 04:02 PM
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Originally Posted by Ziggy87 View Post
I was wondering would a 100 watt hps work for a flowering cabinet grow that is 24 in x 10 in? Would it produce too much heat? And how far must the light be from the plant? The closet is only about 3 feet tall so I know that the tops of the plants will probably hit the roof, and I don't want them to get burned. Right now I'm using cfl's but was thinking of changing to get the better lumens: watts, and for light penetration.
with a space of less than two square feet I would stick with CFL....I don't see many HID less than 250 or 150w if you did find a 100w hps I think it would give you enought lumens for that space though I would be more comfortable with a 150w hps for that space (not in terms of heat but lumens)

can't you set up your cfls so that you are getting plenty of side lighting down into such a small canopy?
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Old 05-08-2008, 04:05 PM
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you should go with CFL's in that area as in this case youcan provide more lumines with more cfls and alot less heat ... unless you plan on alot of ventilation in the area then go with hps and a cfl or to for side light if you can
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Old 05-08-2008, 06:40 PM
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there are HPS bulbs with as little as 50W but it doesn't make much sense to work with anything below 400W as the lum/W ratio of the smaller once is either the same or inferior to CFLs.

so for that little space i would use CFLs for sure - but watch out as they get hot as well!
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Old 08-24-2008, 04:01 AM
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Do a search for 150 watt hps club. Google it, lots of folks getting great results with 150's. It takes more attention to detail to get good results with under 400w, but it's entirely possible, don't listen to these naysayers! Good luck!
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Old 01-22-2009, 09:24 PM
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i got a 250w hps street lamp i converted into a remote ballest grow light and it hardly puts off any heat in a 3x4x6 foot closet, IMO id round me up a street lamp like mine and use it. i have pictures of the modifacations it took to convert it and well it took me 5 mins and two small bolt holes to drill to make one hell of a setup..
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Old 01-22-2009, 09:29 PM
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also the tube t5 flourescents could be an option.

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Old 06-08-2009, 03:23 AM
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I have to admit ask anyone in here and they will tell you i'm a die hard HID guy but I gotta say that the cfls and Flouros are DEFINATELY sounding right for that space. I have 2 400 watt HPS lampos going in a 20"deep by 6'long closet and even though it's 96" high it is a real chore with un lensed reflectors and that power to keep the climate right. In your case I would have to say the cfl/flouro lighting is the way to go andf is efficient too so there ya go.
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Old 06-08-2009, 03:45 AM
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I have a space a little larger than that (24" x 15"), and I am using a 250w HPS in a diy cool tube. And after tasting the results, I highly recommend. You can get away with more than 100w in that space if you are doing HPS. It looks like a 150w, 250w or CFLs is your choice.

(You should double check the calculations for the 250w.)
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Old 06-10-2009, 03:33 PM
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i have 70 watt hps 8 23 watt and 1 t5 flouro in 2x2x5 equal about 30000 lumens is this enough.
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Old 06-10-2009, 03:58 PM
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I just posted this thread, maybe it's an option for you?
Hurry, quantities are limited*
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