krap101
Aquarium Advice Addict
The main advantage isn't electricity usage as alot of people think, but the longevity of the led. Most leds are rated at around 100,000 hours, unlike cf and mh bulbs which only last about a year before they start dimming or slipping spectrum. The leds will cost $30-40, the power supply looks to be around $45, the heatsink probably around $50.
Once leds become more mainstream, I'm sure there will be a wpg-type rule. I posted earlier the sipled "guideline", which is basically the only reasonable guide there is right now. PAR is the best right now, and I read PUR is even better, but testing tools are expensive, and hard to find, and lumens doesn't measure the light plants can use, but what we see. I think lux is a better measurement, but I'm not sure how these are measured.
Once leds become more mainstream, I'm sure there will be a wpg-type rule. I posted earlier the sipled "guideline", which is basically the only reasonable guide there is right now. PAR is the best right now, and I read PUR is even better, but testing tools are expensive, and hard to find, and lumens doesn't measure the light plants can use, but what we see. I think lux is a better measurement, but I'm not sure how these are measured.