Lighting Question
Lighting Question
(OP)
I'm not sure that this is the appropriate place, BUT here goes... I am about to review induction lighting fixtures versus using HPS fixtures for roadway lighting. There are a lot of pros for using them: high CRI, longevity, etc., however, I am hesitant on making a decision as far as implementing it as I feel like this may be the "betamax" of light fixtures and they may disappear after a few years. LED technology looks more promising.
Any thoughts or insights?
Thanks.
Any thoughts or insights?
Thanks.






RE: Lighting Question
Perhaps others may be familiar with a manufacturer who has a system available, I would be interested in seeing it.
RE: Lighting Question
RE: Lighting Question
That is my point exactly. I know the fixtures are around for the induction lamp. I do not know that there is an equivalent LED fixture that will do the same job. I would not hesitate to use induction lamp fixtures. While the first cost is higher, the lamp/ballast life and the lower energy consumption, (well-lower than HID), will offset the initial higher investment over the life of the system.
EEJaime
RE: Lighting Question
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RE: Lighting Question
Anchorage is pulling out 30,000 street HID lights to replace them with LEDs. San Jose, CA is pulling out 250,000 street lights to replace with LEDs. LEDs are the future.
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http://www.bbeled.com/LED_Streetlight.htm
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Keith Cress
kcress - http://www.flaminsystems.com
RE: Lighting Question
Thank you for the very informative links, it appears that some manufacturer's are in fact producing the LED hardware. I am not familiar with them but they look very interesting. Especially that bbe link. I think I will try to track down a photometric report, it is difficult to believe that a true IES type III distribution can be achevied by these fixtures. I will look into this further, and thanks to the OP for an intrigueing question.
EEJaime
RE: Lighting Question
I am working on a few LED systems now, none are street lights, but constantly see new controllers targeted at just running street lights. So expect fairly rapid evolution in this realm too.
As for brightness I just read a hands-on-review of an LED dive light that was substantially more powerful than an equivalent HID dive light. So the brightness is coming up.
If you spec street lighting you might try getting your hands on one of the 50 foot cobra heads and see what you think.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Lighting Question
"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies