Retrofitted fire station demos LED lights next to old high-pressure sodium

It should certainly be possible to run the lighting at 2 different levels, a lower level when no motion was detected and a full brightness level when any motion was detected.The Fire Station is a nice example photo. Regards, darcylars lyco.co.uk

And the HPS used less fixtures, the high color temperature of the LED setup sucks, glare,in rain and fog they suck even more, like the Xenon on cars coming at ya blinding ya. LED's are great, but this color is baaaaad, not for security and general lighting in this setting LPS (SOX) still has more l/W than any other lamp still, introduced in 1932 !!! By Philips, who is also now the leader in LED inovation. Sometimes the leaders stay the leasders for a reason.

It is interesting how a panel scientists guiding energy decisions for the country in the 1950's determined we needed to go nuclear. However, an array of environmental groups prevented it, and blew things out of proportion in the media. Since the same group things Europe is so far ahead, one would be amiss if they didn't mention France is 93% nuclear for their electrical power! The Fire Station is a nice example photo, there are a bunch of parking lot, and parking garage examples of a similar situation, where less lumens appears brighter. It revolves around color rendering index (CRI) and in essence something similar to "gamut", which I don't recall the term off-hand. In many installations, the lights are actually producing half the total lumens, but appear brighter, quandary is- will it affect telescope camera or human eye astronomers the most? If they are making less over all light with the LEDs in lumens, shouldn't it affect both of them less? Some of these are trick questions, so think. ; ) .

LED light is more directional than other light sources, so astronomers have fewer problems with LED lighting than with classic lighting. Also LED light has almost no UV and IR in it, making it much less of a problem for wildlife too. It does not attract insects.

I'm left wondering why LED setups such as these, which integrate ambient light sensors, power control circuitry, and microcontrollers... why don't they leave them dark when there's no one around to appreciate the superior spectrum of the emitted light? Since LEDs don't suffer from cold cycling or slow start problems, why not take further advantage of the power and life cycle savings?