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

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  •  CREE lamps (1+ / 0-)
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    . . 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-)
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      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-)
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        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-)
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      Is to control nitrate levels in the water.

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