T5 light height on seedlings

Discussion in 'CFL / Fluorescent Lighting' started by Poppacrunk, Feb 16, 2018.


    Poppacrunk New Member

    how far should t5 lighting hang from my seedlings this is the one I was looking at

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    Samblakaka Active Member

    I keep 1 24 watt ho t5 taped on top of the humidity dome on my cloner/seedling starter and after that you can keep it as close as heat management allows...I personally wouldn't go much closer than 3 inches regardless of what people say about how you can basically stick these on top of your plants...look at and learn to read your plants and it will tell you if there's too much heat/light. I have a 200 watt 2 ft 8 bulb ho t5 in a 3x3x5 tent and I have it fixed to about 8 inches from the top of the tent...I never move it and never have any issues with stretching/long internodal spacing

    Samblakaka Active Member

    I figure it's better to let your plants grow into the light rather than risk burning them if a growth spurt happens, which it will if you're doing things right

    MichiganMedGrower Well-Known Member

    I sprout seedlings about 10” - 12” under the t-5’s and then 6”-8” when they get older. Of course adjusting as the plants show stress.

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