How To Create GW Artificially?, Split From Topic 1332 Options

[HappyBuddha]

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I think theres not much difference from using artificial lighting or the sun except sun is more efficient in generating green water. And most importantly, its FREE 

Actually there is an important specification to look out for when selecting an artificial light source to keep green water -- the colour temperature must emulate natural day light as closely as possible. Look for a lamp with a output of between 6,500 Kelvin to 10,000 Kelvin. Anything less than 6,500 kelvin will be yellowish, while above 10,000 Kelvin too blueish.

I can't remember who... but recently a fellow member was getting nitrite reading in his green water, and I suspect without much investigation that it's due to his Metal Halide lamp producing less than 6,500 Kelvin. If you ever try to keep outdoors plants indoor by beaming it with very "bright" (but yellowish) incandscent lamp (about 3000 Kelvin only), you'll find your plants die because you didn't provide enough "sunlight" although the lamp is "bright". On the other hand, the same plant can probably survive longer if you provide it with a not-so-bright flourence lamp with a "daylight" rating.

To find out more... Osram has brochures that explains light colour:-

http://www.osram.com/service_corner/downlo...uchtstofflampen