Quote:
Originally Posted by stumps
I'm going to be the bad guy. when you put a hood on a bunch of low watt cfl's all you do is trap heat. now the math. you need to keep a cfl 2-4" off the plant to use them for growing. lets say what your using has 100% reflectiveity. It doesn't by the way more like 30-40% at 100% you would only get about 50% light off the reflector. I do back off my statement that the reflector does no good with low watt cfl's. It does have some value. but the heat build up is a much larger neg value. cfl light is great I use it myself. I know my expalatoin sucks but if you reserch how light works I think you'll figure out what I'm trying to say.
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i have never seen a hps or mh that i would wrap my hand around when it has been on for over an hour what about you? my cfls i can grab and unscrew while they are on either 15 minutes or 15 hours. as for my hood trapping heatmy intake fans are located at the bottom of the box and i have an exhaust fan mounted in the top so my air flow goes straight up so heat being trapped is not an issue.
Quote:
Originally Posted by fdd2blk
i making fun of the OP. i know i shouldn't, but how many actual watts is that thing pushing? a 250 MH would do really nice in the area he is growing in. much easier to vent as well.
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fdd2blk i have read many of your post and would like to tell you thank you for your input. but my cabinet is not very tall and in order to get a hid in there and being able to cover all 6 sq feet would be next to impossible but i understand where your coming from. i have just chosen to use cfls as they are easy to obtain and i can get them close to the canopy
Quote:
Originally Posted by tom__420
Not only is it pushing a lot of watts but it looks like the most unsafe CFL setup I have seen. That thing has got to be at least 400 watts... I can tell ya for a fact that a 400 watt MH would grow better plants than that thing. And fdd does have a point about the metal halide being easier to cool, good luck cooling those 16 bulbs or however many are there.   |
my temps stay at 77 degrees in an 18 cubic foot space with two 4 inch pc fans and one ten inch household fan. think you can cool your 400 watt mh with those fans? i think not so please put your two cents back in your pocket as i dont need someone jumping on fdd2blks coat tails and trying to down a cfl grower. the post says hood for cfls not try and talk someone out of using a cfl because you think their setup sucks. remember opinions are like assholes
Quote:
Originally Posted by AquafinaOrbit
An HPS system is capable at peak to achieve 140lumens per watt,(Usually a fair amount less then that) a CFLs is 90 but it's lumen per watt range doesn't vary as much. Of course heat is simply the current flowing in the bulb so watts represents heat. So is what your trying to say is that a CFLs light is not worth reflecting, but an HPS bulb is? People reflect HPS often because if you can get back even say 5% of the light on a system that powerful then you've added a lot. CFLs are of course much weaker generally speaking but if the room is properly ventilated then I don't see a reason a reflector would be bad. That being said CFLs are so cheap these days I rather just buy a couple extra bulbs. I actually like this guys reflector, though I think he should add a few cumputer fans to the sides and I'd seriously make sure those bulb sockets can handle those amps.
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sockets are cool thanks for the defense of the cfls i have added two 4 inch pc fans at the bottom of the cabinet and a ten inch fan in the top of the cab as well the pcs are for intake and the ten inch is for exhaust
Quote:
Originally Posted by stumps
another thing about cfl light. With 23w bulbs you will only get so much light them being so week does not penetrate the canopy so all the extra light on top is no help you need to get inside the canopy. so max watts on top and get the rest down inside the plants.
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stumps have you ever heard of a scrog??? all there is is the fucking canopy!! come on man i dig cfls if i wanted a hid i woulda bought one and the title of this post would have been different
Quote:
Originally Posted by IllegalSmile
Looks like a very creative set up man, kudos....how close are you going to try and get the bulbs from here on out?
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thank you i can keep this hood with in 3 inches and be safe