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View Diary: UPDATE x3: LED Lightbulbs Finally Ready for Prime Time! (282 comments)

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  •  Also, about aquarium lighting... (1+ / 0-)
    Recommended by:
    Ender

    Algae is caused by the red end of the spectrum, not heat.  (That's fortunate, because most aquariums have thermostatic heaters to maintain a constant temperature.)  Those fluorescent lights that were best for growing plants were often the worst promoters of algae, and it was a trade-off decision point.  I don't expect that to change with LEDs.

    •  CREE lamps (1+ / 0-)
      Recommended by:
      Ender

      . . are made in cool white and warm white. Maybe the cool white ones won't promote algae growth. I use those over my workbench.

      •  cool white ones specifically (1+ / 0-)
        Recommended by:
        JerryNA

        aren't very good for plants.  It doesn't mean that you can't GROW things underneath them.  It just means if you have expensive plants, they won't thrive.

        The best fluorescent aquarium plant light ever made was probably the Sylvania Gro-Lux, which they don't make in 40 watt anymore.  It was very strong in the red and blue ends of the spectrum and weak in the green.  We used to love them.  Fish seemed to glow under them.  Not "true to life," but still rather attractive.  And the plants grew like crazy.  Lots of algae, though.

        •  just to add a note about veggy seedlings (1+ / 0-)
          Recommended by:
          JerryNA

          If people are raising vegetable starts, tomatoes from seed, etc. or any other plants from seed, cool white bulbs are perfectly adequate and much cheaper.

          I learned in my garden reading that warm-spectrum light bulbs, or 'full-spectrum' bulbs, or 'grow lights' are only needed for plants when they reach the flowering/fruiting stage. For plants in the first developing stage they aren't needed. Or I should say, those spectrums aren't needed.

          I used to grow magnificent vegetables that I started indoors--tomatoes, peppers, eggplant, okra, herbs, etc, etc. all with cheap florescent cool-white bulbs. These plants usually spent just a few weeks indoors until transplanted outside.

          Where in the Constitution does it say: "...on behalf of corporate interests" ???

          by sillia on Sun Jun 23, 2013 at 07:54:35 AM PDT

          [ Parent ]

      •  By the way, best way to control algae... (1+ / 0-)
        Recommended by:
        Ender

        Is to control nitrate levels in the water.

    •  I have a fluorescent light for plants (1+ / 0-)
      Recommended by:
      sillia

      I use it to start seedlings. Although that is what it is designed for, I get leggy seedlings which means that it isn't bright enough.

      There aren't many bulbs that fit that socket and if they did, I would need a different ballast for a different wattage.

      So I considered an LED side light as an adjunct to what I have. My friend suggested that I research the marijuana boards. Sure enough, they had suggestions, but they were 300 to 400 dollars!

      That is way too much money for growing a few stupid plants.

      There really aren't any standards. You have to go by word of mouth.

      I'm not growing cash crops so a reasonable price for someone else is a ridiculous price for me.

      •  just get a regular shop light (2+ / 0-)
        Recommended by:
        JerryNA, Ender

        that takes the 48" tubes and use cool-white bulbs. It's a good idea to swap in new bulbs every year as they can lose brightness after a season's use.

        Put the emerging seedlings closer to the light and move the light away as they grow taller, this will prevent legginess. I have done this two ways: either with the shoplight on adjustable chains or the seedlings sitting up on wood blocks to bring them closer to the light.

        I've always had fabulous garden plants with the cheapest possible setup. The only reason I'd consider LED's for this purpose is if they'd fit in the same fixtures and use less electricity.

        Where in the Constitution does it say: "...on behalf of corporate interests" ???

        by sillia on Sun Jun 23, 2013 at 08:01:59 AM PDT

        [ Parent ]

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