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Thread: What distance should my light be from my plants?

  1. #11

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    Quote Originally Posted by rolllllio View Post
    24 inches is way to far away, it will cause your plants to stretch. Cfl's can be placed 1 inch above the tops of the plants. As long as the leaves are'nt touching the bulb your be ok.

    this is what i thought, but then the heat kicking off them warms the space to over 33c. its a constant heat/distance battle.

  2. #12

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    how far really should i have my 600watt hps????i have good extraction so can probably get it as close as poss....but what do you recommend...good thread btw...really helps ppl
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  4. #13

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    I would put that 600 at 15 inches from the top of your plants

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    i,ve seen some hoods with fans clamped on them do you think this will help with the heat alot more?? i have my fans clamped on the side of my tent pointing at the plants, where do you think is best to put them??... Great Thread btw helps loads

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    Quote Originally Posted by massivemick View Post
    how far really should i have my 600watt hps????i have good extraction so can probably get it as close as poss....but what do you recommend...good thread btw...really helps ppl
    massivemick..I have a 600w and the top of the buds is around 18 to 20inches mate and its warm but not too hot so I am sure this will also be ok for your plants,open the tent flaps wide as possible because it can get to 30c to 32c in my tent if those flaps are shut,my temps are around 24c which I think are ideal




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    Quote Originally Posted by nooby_dr_green_thumb View Post
    i dont understand how it can use more electric?

    600w hps = same costs as 600w cfl

    600 watt is 600 watt lol
    its the same watts but you would get more lumens that penetrate the leaves mate,a good idea is to have maybe a 600w hps above the plants and a 250w cfl or so in between the plants to give the leaves that are not getting any lumens from the hps but make sure you dont hang the cfl vertically from the top,make sure the cfl is pointing upwards from the floor




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    i have a peace of sting hanging 18" from my 600w hid and have a glass thermometer hanging from it, i always try and keep the top of the thermometer level with the top of my plants, so far iv found this ideal and you also get an accurate temp reading at canopy level and you know when to adjust your light height
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    Quote Originally Posted by yoko2009 View Post
    i have a peace of sting hanging 18" from my 600w hid and have a glass thermometer hanging from it, i always try and keep the top of the thermometer level with the top of my plants, so far iv found this ideal and you also get an accurate temp reading at canopy level and you know when to adjust your light height
    yeah thats how i do it mate,like i said earlier if you have the thermometer horizontal it tends to show about 6 to 8c higher.




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    i,ve seen some light hoods with fans clamped on them to cool the lights do you think this will help with the heat alot more?? i have my fans clamped on the side of my tent pointing at the plants, where do you think is best to put fans??

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    Quote Originally Posted by sealover1 View Post
    i,ve seen some light hoods with fans clamped on them to cool the lights do you think this will help with the heat alot more?? i have my fans clamped on the side of my tent pointing at the plants, where do you think is best to put fans??
    I have only a big summer fan on a stand blowing coo, air onto my 600w hps bulb,its on highest setting and it also blows around the tent amongst my plants so all is ok,and i have a filtere/fan as well and I always leave the tent flaps open which i think is essential for healthy plants,just make sure the door is closed and have wall aroma spray things..




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