CFLs for seedlings

Discussion in 'First Time Marijuana Growers' started by deuteros, Aug 17, 2007.

  1. I was thinking about using CFLs on the seedlings and then switching to HPS for vegetative growth. How many watts would one seedling need and how long should I wait until switching to HPS?
  2. Yeah, just get a 25 watt CFl (6500K), maybe 2 if you are ambitious.

    Keep it within a few inches so she won't stretch towards the bulb.

    Good Luck!
  3. i use 1 23w Cool White per Seedling... worked out well so far
    just keep em close to the plants
  4. So how long until I should switch to HPS?
  5. That really depends on the yield you're trying to achieve, and the characteristics of your particular strain of herb. 4-5 weeks of veg. for a clone should be good. If you're growing from seed, keep the plant vegetating until you have several internode (branches, not fan leaves) before you switch to flowering.
    5 weeks of vegetative growth


  6. I bought three of the undercabinet lights from walmart.I then switched the bulbs to 2 grow and 1 daylight.The new bulbs are a hair bigger but fit.This setup is rather cheap but works great for my propogation..You could prolly get away with just one lamp at first tho.GL

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