Originally Posted by rudedog40
I was looking at the specs on these Solaris lights. They gave this info on a 48" model ($2500):
I think the majority of the costs comes from the computer that simulates the clouds, nighttime, etc., and automatically turns the bulbs on and off for you. If I could find out which specific LED's they use for each spectrum, I'd just put each one on it's own power supply, and use timers to turn the different LED's on and off.
Those must be some super bright LED's to get that type of output.
Nowadays, the super-powerful LED market is more-or-less cornered by a company called Cree. They make LEDS that can sink an enormous amount of current and create truly amazing amounts of light.
I'm designing a lunar cycle simulating moonlight system for my new tank project based on a set of (4) 3-watt Cree LEDs, so I might be able to give some insight on the costs... corals reproduce based on lunar cycles, so I am designing the system to be able to handle full moon, half moon, full, etc.
The computer is a big part of the costs, but the real cost is in the mixing of the light output from each LED. I've seen the Solaris system in operation, and several different types of LEDS are on at once. To achieve a given spectrum, they vary the intensity coming out of each particular color or group of LEDS. To do this, you use an electronics technique called Pulse Width Modulation (PWM). These circuits are somewhat complex. Ergo, simply using timers to turn on and off different groups of LEDs is probably going to fall short of the reef's requirement. The PWM design is probably where a lot of the costs are hiding.