400w Metal Halide too much for seedlings?

Discussion in 'First Time Marijuana Growers' started by leao, Jan 20, 2009.

  1. #1 leao, Jan 20, 2009
    Got everything set to go, all ducks in row, and now that I'm waiting for my seeds to pop through the soil, I thought, "Ahhh shit. That 400w Metal Halide I got for vegging could be too much."
    So, can anyone tell me if that I put the seedlings under that light, are they gonna fry or will they be O.K.?

    Thanks in advance for any help
     
  2. #2 R-VER, Jan 20, 2009
    Keep the light 3 1/2 feet away from seedlings and after 2-3 weeks move the light closer. Here is a Growth Chart for your lights.
     

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  3. #3 zpyro, Jan 20, 2009
    if you're @ all worried about stretching, i'd suggest some CFLs until the seedliings are strong enough to take the MH. i used 4 27w daylight cfls, they aren't hot so you can put them much closer and keep them from getting too tall. i switched to the 400w MH in probably a week or 2. i also LSTd them
     
  4. #4 toastybiz, Jan 20, 2009
    Both above approaches are sound.
     
  5. #5 leao, Jan 20, 2009
    I guess I'm gonna have to get some CFLs for safety's sake. After all, seeds aren't cheap.
    Thanks again for all the help everyone.
     
  6. #6 yesicancancan, Jan 21, 2009
    God knows I wish I had LSTd mine. Too late now, just gotta hope for the best. Maybe I can still SCROG?
     
  7. #7 scottej2004, Jan 21, 2009
    remember metal halide puts off more heat than hps...
     
  8. #8 420choochoo, Jan 24, 2010

    Actually, the subject is M.H. lighting and the posted picture is for HPS. Here is the correct chart.
     

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  9. #9 dimboijx, Jan 24, 2010

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