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  1. #1

    Join Date
    Nov 2002
    Location
    Massachusetts
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    8x10 Format
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    93

    Possible flourescent light source for 8x10

    Has anyone ever tried one of these as a light source for 8x10?

    http://homeharvest.com/hydrofarmcompactfluorescents.htm

    Just curious. Look as though it would work and it would come ready to use. I did not check on the bulb cost, but it is probably not cheap to replace.

    -Paul

  2. #2

    Join Date
    Nov 2004
    Location
    Italia
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    Multi Format
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    4,680
    Seems expensive at 165.

    You could buy two of these for $20 each.

    http://www.topbulb.com/find/Product_...ductID_E_51328

    Add a couple of light bulb connectors. The local Home Depot sells ones with a edison bulb fitting and a two prong connector on the other end.

  3. #3

    Join Date
    Nov 2002
    Location
    Massachusetts
    Shooter
    8x10 Format
    Posts
    93
    Good point.

  4. #4

    Join Date
    Oct 2004
    Location
    Fond du Lac, Wisconsin
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    I once made a light source with 12 18" flourescent tubes. I rapped alternating tubes with green and blue roscoe filters, and I could control each colored bank independently. I used high quality electronic ballasts. If you use the high CRI bulbs, you get about 1 stop faster printing with the blue (high contrast) bulbs.

    There are some issues. The bulbs are brightest in the middle, and so this need to be evened out. Second, light output varies with temperature. So as they heat up, they get brighter, at least until they are about 110F. Higher temps lead to reduced output. So, either you need some type of light measuring timer, ala Metrolux, RH Designs, Zone VI..., or you should leave the light on all the time to stabalize temp, and use a shutter to control exposure.

    After futzing with my DIY head for a while, I eventually bought a different 8x10 enlarger. It came with a standard color head, which I prefer. Given the cost of 8x10 enlarging equipment, I'd look for a cheap dichroic color head, unless you simply want to monkey around.



 

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