Lighting question

Discussion in 'First Time Marijuana Growers' started by mojo, Nov 11, 2001.

  1. Hi Folks!

    I have a 5 x 5 space thats well ventilated and it's easy to control the temp and humidity.

    I'm trying to get some seedling to startup, but the 18" flourescents aren't doing very well.

    Here's what I'd like to do-

    I'd like to switch to the Metal Halide 400 watt, and put a screen between the lamp and the plants to diffuse the light enough for the small seedlings/plants (3" - 6 ").

    Does this sound reasonable? Any suggestions?

    Thanks everyone!

  2. no it sound like a dam good way to brake or over heat the one good light you have! try wall marts shop light twin flour with plant & aqiurum bulbs they work great for starting and up to 4 weeks then go to the 400 mh and then get a conversion bulb for that 400mh change the bulb to hps!youll thank ,me latter! the flour twin bulb shop light and bulbs run about $24 the conversion is $69.99and you ll be very happy you did!good luck tazz11
  3. Actually, there's about 4' clearance between the MH-400 (which is a conv bulb, for a HPS sys.), and the plants. I'd like to consider putting a screen, net or mesh about mid-way (2 feet) between lamp and plants to diffuse the light enough for the young seedlings.
  4. it wouldnt burn them any way !puting a screen there well help them top up with more tops , but 14-16 inches is the hight of a 400 watt light from a plant so you have lots of room and yes it well defuse the light some what but not needed for that!make sure your screen is 2 inch holes!and your in good shape with the conversion bulb! i use the same thing i 430 son argro!but wait a min! you said 4ft between the light and the plants ,now is that between the light and the plants or flour of the room and how big are the planters ,that well make some ideas latter but for now the lights 3ft above the plants the way your saying it and thats a lot!but yes i would but the screen in its harder to add it after!i am going by the way my old grow box worked i havent used it in years it out back about 4by4 by7ft , now i use a 8by 12 ft room! it sounds like you know what your doing why did you ask?tazz11

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