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Thread: Light Distance Chart's

  1. #11

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    when the chart refers to the lamp being to close is this because of heat? im using a 400w cool tube hps. does this chart meen anything for me?

    cheers
    ric

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    GEORGE (03-12-17)

  3. #12

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    Quote Originally Posted by Mr_Bimble View Post
    Dont suppose theres something simular for CFL's?
    With CFL's you can have them about 3" away for best results but make sure they don't get to touch your plants or they will burn.

    Quote Originally Posted by ricochet View Post
    when the chart refers to the lamp being to close is this because of heat? im using a 400w cool tube hps. does this chart meen anything for me?

    cheers
    ric
    It is for heat and also you can light poison your plants if the HPS light is to close. So yes mate you could have the light an inch or so closer than what the chart states if you are using a cooltube.

  4. #13

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    thanks for the reply, if only i had your experiance and knowledge!! peace!

    Ric

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  6. #14

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    No prob's mate. You will if you keep reading and asking questions and take it all in mate, but bear in mind we are all still learning thats the good thing about growing.

  7. #15

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    newbi question here so in reference to the light distance charts does it matter what stage of growth your at ive just started veging in a 1m x 1m 2m tent under a 400w lamp about 2 1/2 feet away is this too much?
    Even genius has to pay its dues.its's goodbye to the shortcuts,hello to the grind.nobody ever said it would be a easy ride.so push more,risk more,feel more,how much is just a question of courage,a matter of heart.

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    GEORGE (03-12-17)

  9. #16

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    is this the height for both veg and flower stage and if so what height should i keep it above my seedlings if i plan to use 400w hps light

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    GEORGE (03-12-17)

  11. #17

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    Quote Originally Posted by ipmiller View Post
    is this the height for both veg and flower stage and if so what height should i keep it above my seedlings if i plan to use 400w hps light
    I wouldn't use an HPS on seedlings as its too strong and you could easily fry them.
    With CFL's being nice and cool I'd be tempted to use a 200W 6400K CFL until they're at least 6" high - then switch over.

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  13. #18

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    that seem too hot 400 watt one foot 50 away from it wouldnt that fry it ????

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  15. #19

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    I can have my 400w hps at half a foot to a foot away from the top canopy at 26.C, would it fry my plants because the light intensity is to much or somthing like that, or should I wack the 400w hps half foot away?

    Peace
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  17. #20

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    Quote Originally Posted by Muller View Post
    I can have my 400w hps at half a foot to a foot away from the top canopy at 26.C, would it fry my plants because the light intensity is to much or somthing like that, or should I wack the 400w hps half foot away?

    Peace
    Hold your hand over the top of the plant and if it starts to feel uncomfortable on the back of your hand after a minute it's too close.

    Get your fan running between the top of the plants and light.

    I have my 600w hps 8 inch above my plants this way

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