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#1
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Lighting Problems
Hello, I've been recently growing a few orchids(mostly phals) in my
west window, but lately their leaves have been turning dark, dark green, the roots all still look fine, I'm just worried about the lighting. Anyway, I'm thinking about doing artificial lighting next week, and I'm wondering if 2 40 watt daylight bulbs in a shop light fixture will be okay? I'm just wondering if this will be enough, I can suppliment this with a few hours of shaded sun that my west window gets. Thanks, Sandra |
#2
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Sandra,
That should help a lot. Most recommendations on the group are for one cool white and one warm white rather than the higher tech bulbs. Start the light about 18" above the plants for a week or so and then lower it 3" a week till 9" to 12 " above the plants. Watch for other comments and opinions soon to follow. Bob "sandra" wrote in message oups.com... Hello, I've been recently growing a few orchids(mostly phals) in my west window, but lately their leaves have been turning dark, dark green, the roots all still look fine, I'm just worried about the lighting. Anyway, I'm thinking about doing artificial lighting next week, and I'm wondering if 2 40 watt daylight bulbs in a shop light fixture will be okay? I'm just wondering if this will be enough, I can suppliment this with a few hours of shaded sun that my west window gets. Thanks, Sandra |
#3
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I find the partially open miniblinds work very well with 1/3 light and
2/3 shadow. 900 to 1200 foot-candle is what's recommended. sandra wrote: Hello, I've been recently growing a few orchids(mostly phals) in my west window, but lately their leaves have been turning dark, dark green, the roots all still look fine, I'm just worried about the lighting. Anyway, I'm thinking about doing artificial lighting next week, and I'm wondering if 2 40 watt daylight bulbs in a shop light fixture will be okay? I'm just wondering if this will be enough, I can suppliment this with a few hours of shaded sun that my west window gets. Thanks, Sandra |
#4
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I actually looked into artificial lights, but unless you have plenty of
bulbs at different heights, you will run into something growing higher than others. With the sun, the difference between 1 foot or 2 (e.g., taller leaves or spikes) is not significant because the sun is so far away; but with artifical light, that's a very big difference. I bought a foot-candle meter so as to measure the foot-candle of the light for my orchids. When 6 inches below the light is 900 foot-candle, 1 foot below the light becomes way too dim. Your best solution is actually using the western sun with either miniblinds or get some lace fabric from wal-mart. I have southwestern windows that I use for all my orchids. Where there is no miniblind, I hang a piece of lace fabric which breaks down the sun light. With phals, I just place the plants further away from the window. That way, my catleya and frag get their strong doses while my phals get reduced light. With miniblinds, I usually adjust it to get full sun in late afternoon so it will get broken sunlight when the sun is higher up and still very strong. With lace you don't have that problem because the light is already broken up. sandra wrote: Hello, I've been recently growing a few orchids(mostly phals) in my west window, but lately their leaves have been turning dark, dark green, the roots all still look fine, I'm just worried about the lighting. Anyway, I'm thinking about doing artificial lighting next week, and I'm wondering if 2 40 watt daylight bulbs in a shop light fixture will be okay? I'm just wondering if this will be enough, I can suppliment this with a few hours of shaded sun that my west window gets. Thanks, Sandra |
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