LED Lighting.

I don't think LED technology has scaled up that far yet, at least not in affordable versions. Philips recently announced on CR4 an LED bulb equivalent to a 60W incandescent, so it looks as though there is still a ways to go. All in due time, one hopes.

We actually have 4 new LED lights hanging right now as a test, and we are not quite shure on what to think of them yet, the LED light is a lot softer than the old MH or the T5 fixture that is beside it.

I assume by softer, you mean fewer shadows. Is that correct? Please tell us the size (power or luminosity)of your test lights, and how long you have had them.

I am very interested in your test, can you keep us posted on your opinion of the new LED's.

We have many clients asking about LED lighting and some feed back would be a great help.

Thanks

check out this magazine.

www.ledsmagazine.com

I found an advertiser with this, twice as efficient, long lasting, but expensive.

As others say, not ready for prime time yet. About 3-4 more years.

http://www.atgelectronics.com/lighting/Illumination/LEDFluorescentTubes/iBright-E28i-LED-Fluorescent-Lights-%28G2-EPS%29.html

I have a solution for you that is designed for your specific application. If you want the specs please shoot me an email and i will send the info. Best regards, Mike.

Michaelgrover1018@hotmail.com

Take a look here: www.cls-led.com

@ MichaelGrover: why not share it with all of us? Isn't that the core of this site?

My research indicates that LED's are not cost effective at this time. They have made a large improvement, but they are just not there yet. In the past year and a half, I have replaced about eight hundred 400 W MH lamps and fixtures with six hundred six lamp four foot T8 fluorescents. This cuts the energy by 2/3. 800 lamps x 465 W per lamp = 372 kW removed. 600 fixtures x 220 W per fixture = 132 kW installed. The CRI is much better, and since they have instant restrike, we are putting motion sensors on each fixture. Payback is less than a year. I recommend 5000 K instead of 4100 K to get a whiter light. Light levels are better now than before the replacement. Mounting height is 25 to 30 feet.

I'm an energy engineer not a lighitng salesman. The LED technology is improving. If you look at a high bay project in strict energy savings vs cost from a simple payback perspective, the project will not be cost effective. However, if you consider the maintenance savings in the equation, in some situations, LED for high bay can produce a good ROI. If you can have a bi-level aspect to the light output, that will really help your financials. outdoor parking lot lights are a really good example of this btu the same will be true in a high bay applications.

You need to be careful about the LED product. There's a lot of variance in quality and thus price. Some of the over seas manufacturers will not be able to hold up to the lamp life they are promoting.

The DOE has some good white papers on the LED technology. One fo the manufacturers in the projects in these white papers is www.betaled.com I've heard their product is very good and well tested.

You'll need 3-4 led fixtures to replace one of the 400 watt fixtures. If the fixtures have a good thermal control to protect the emitters, you'll get a good 50,000 hours of maintenance-free life. After that, the emitter will start to break down over it's lifetime which should reach 100,000 hours. Albeo makes high-bay and low-bay systems you should look at to compare to others like Phillips. www.albeotech.com Keeping them cool is the main thing.