HPS yet?

Discussion in 'Growing Marijuana Indoors' started by Smokin Jake, Oct 24, 2002.

  1. Hey everyone!

    My 400whps has turned up!!! Is it ok to use it straight away? my seedling are about 2 - 3 inches high and are just over a week old, been using fluros to start, so is it ok to use the 400 yet or will it be too much for them?
  2. Cheers arseface! Got that over them now and its about 2 foot away from them (seemed a bit hot to go any closer)

    Cant wait to see the effect that badboy will have on them!
  3. Rule of thumb for lights is 1 cm away per every 10 watts. So a 400 watt light needs 40 cm of seperation to keep from burning them up. Now, you can augment this with some heat extraction fans and get them closer.

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