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To: Kirk © who wrote (10039)8/28/2001 1:24:33 PM
From: Math Junkie  Read Replies (1) | Respond to of 10921
 
Have you noticed the LED traffic signals?



To: Kirk © who wrote (10039)8/28/2001 2:16:27 PM
From: w0z  Respond to of 10921
 
Electricity savings would pay for the "brains" over the life of a lamp.

I reduced my electric bill by 66% (yes to 1/3 of what it was previously) by installing $600 worth (total installed cost) of smart thermostats, timers and outside air thermostat overrides...payback was a few months since one monthly bill was $825 before installing the system. What energy crisis???? The savings potential is enormous!



To: Kirk © who wrote (10039)8/28/2001 4:43:04 PM
From: Katherine Derbyshire  Read Replies (2) | Respond to of 10921
 
Motion detectors for lights have existed for a while. They don't work well enough, IMO. They have a tendency to cut out when the occupant is relatively motionless (reading, typing, etc. I've even seen one cut out when a professor was standing at a podium lecturing.). Perhaps an IR-based detector would work better?

LEDs are rapidly replacing light bulbs for traffic lights, public message boards, turn signals on buses, etc.

Katherine


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