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  1. #1
    organic is offline Banned
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    Default Daylight bulbs for seedlings

    Hey folks.

    I don't have a heated propagator, so to get some of my seeds going I've got an unheated one on a desk in the office and put a desk lamp (standard 60W pearl bulb) directly over it to provide both heat and, when the seedlings push up, light.

    I've just had the first seedling break the surface today and it's made me wonder if I might be better replacing the current bulb with one of these:
    Daylight Simulation GLS Lamps : Specialist Bulbs : Maplin

    More blue, less red, colour temp around 5000K (I believe).
    I don't know if any of that makes any difference to plants, but if it does, they are so cheap it almost seems daft not to use one.

    So - worth using or not?

  2. #2
    smallblueplanet's Avatar
    smallblueplanet is offline Mature Fruiter
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    I use an eco 20w daylight version (off ebay) in a fake angle-poise desk lamp and it certainly helped with starting the toms/chillies/aubs early in the heated prop.

    I think (if you check hydroponics sites) that the blue spec is good for growing vegetative and the red spec better for flowering fruiting, but I can't remember exactly - sorry.
    Manda.

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    And a heaven in a wild flower

  3. #3
    Toleman is offline Seedling
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    Those bulbs are no good for growing.

    You want the fluorescent daylight cfl's.

    The daylight GLS bulb in your link is no more than a coloured lens

    Chris

  4. #4
    Toleman is offline Seedling
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    I will add i'm using a blue led panel I made, a 20w daylight cfl and a 20w 2700k cfl in a wardrobe. I have used reflective black/ white sheeting to prevent wasted light:

    Just leds:


    Both:

  5. #5
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    I use a couple of these from Argos.

    Bulbs are 6400k (11 watt) and seem to do a pretty good job.

    Buy Large Silver Energy Saving Desk Lamp at Argos.co.uk - Your Online Shop for .

  6. #6
    BarleySugar's Avatar
    BarleySugar is offline Cropper
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    I posted a while back about using lights Daylight Bulbs
    I've grown my chillies under artificial light since 26/12 and I've got jalapenos set, with buds in the dorset nagas, scotch bonnets and choc habs. I've just started moving them out onto windowsills to cut the electric bill a bit. I also found it only took 6 weeks from sowing to showing buds in tomato plants, but they grew too big for my cupboard. Next year I will know how to calculate the sowing date. The french beans have been cropping for 3 weeks, not many as I only put the plants in to 'use up the light', but I've been amazed at how quickly they grew tooI did post a while back explaining exactly how I'd set it up, but the post was attracting spammers apparently and was taken down.
    Last edited by BarleySugar; 05-04-2010 at 07:15 PM.
    I could not live without a garden, it is my place to unwind and recover, to marvel at the power of all growing things, even weeds!
    Now a little Shrinking Violet.

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  7. #7
    Llamas's Avatar
    Llamas is offline Rooter
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    Quote Originally Posted by Toleman View Post
    Those bulbs are no good for growing.

    You want the fluorescent daylight cfl's.

    The daylight GLS bulb in your link is no more than a coloured lens

    Chris
    Oh, pants. Just what I bought of course. So, to be extra sure next time, would you mind spelling out what to look for? (mystified face from googling '20w daylight cfl')
    The Impulsive Gardener

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  8. #8
    Toleman is offline Seedling
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