BS, a 400 watt is far less intense than sunlight, in the wild seedling wil sprout in full sunlight.I used the 400w for seedlings but it was too intense for the young seedlings.
LOL, where you diging up these "facts"Maximum light requirements for seedlings are 375 foot candles. a 400 w metal halide even two feet above the plant gives off 8,000 lumens. Definitely overkill and could very well harm your plants.
a few days ago i burned two seedlings to death in sunlight and unaltered potting soil. they turned yellow, shriveled up and died. it wasn't lack of water; the UV here was too much for them.BS, a 400 watt is far less intense than sunlight, in the wild seedling wil sprout in full sunlight.
you have to sprout them in sunlight not move them outside after a weeek or so indoors under a skimpy light. or harden them off gradually.a few days ago i burned two seedlings to death in sunlight and unaltered potting soil. they turned yellow, shriveled up and died. it wasn't lack of water; the UV here was too much for them.
Oh great another book / google warrior. Let me guess no real experience growing besides flipping those pages ehh
Using the inverse square law of I = 1/d^2 which is Intensity = Light Output/Distance^2. A 400 w HID has 32,000 lumens. The end result is 8,000 at 2 feet away. Not only is the actual light output too high for seedlings, the heat given off could fry your plants.
A 400 w HID has 32,000 lumens. The end result is 8,000 at 2 feet away. Not only is the actual light output too high for seedlings, the heat given off could fry your plants.[/QUOTE]
so a 400 watt light two feet away is too hot for seedlings ? LOL
Cervantes is a quack BTW.
BS, a 400 watt is far less intense than sunlight, in the wild seedling wil sprout in full sunlight.
Seriously?! Your question was answered, put them under lights. Why would you have a problem with someone else getting help when its a related topic?my thread had nothing to do with his light thanks for hijacking my thread, =(
There is no "I" in team brosmy thread had nothing to do with his light thanks for hijacking my thread, =(