Hi The other advantage of the pre-made bars is that they fit into conventional fixtures. Glare from a wide open high intensity LED can be pretty nasty. Diffusers and reflectors can be good things. Glare is what has very much slowed down my deployment of LED's at home...
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Chris Albertson Sent: Monday, September 17, 2012 11:53 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Reducing lab noise with LED lighting. On Mon, Sep 17, 2012 at 8:08 AM, Tom Knox <[email protected]> wrote: > > The conversion will cost about $100 on the surplus market if you had none of the needed items and should pay for it self over the next few years in energy costs. If you care about energy costs AND getting the maximum brightness you really need a constant current power supply. You can't use a current limiting resister as that will just turn your power into heat. The old PC power supplies are voltage regulated. Linear voltage regulators and series resisters are both easy to use but if you care about power costs the only way to go is a constant current SMSP. You can make a dimmer by adjusting the current output. Or you can simply buy pre-made LED light bars that are the exact shape to replace fluorescent bulbs. They fit into existing fixtures. At work that replaced all the bulbs in the parking garage and not only did each stick use less power but they were able to leave almost half the fixtures empty. Payback should be in a few years. Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
