Maxspect G2-160W

[lmn420]

Most Cree leds are rated 50,000 lifetime hours which means after 50,000 hours their luminosity will have dropped off 30% from a when they were new. So if they put out 100 lumens new after 50,000 hours on average they will put out 70 lumens. I looked up what the the xp-g leds (since that is what I am using) state and noticed that they shortened it to 35,000 hours, but that is still almost 8 years with 12 hours on.
In my opinion 2-3 year replacement cycle for leds is unacceptable for the high upfront cost and the pain of replacing 50+ leds. Of course it is a function of you get what you pay for and Cree is more expensive, but also the most reliable with highest efficiency (135 lumens per watt on xp-g). Hope that helps.

 

[roscoe]

Most Cree leds are rated 50,000 lifetime hours which means after 50,000 hours their luminosity will have dropped off 30% from a when they were new. So if they put out 100 lumens new after 50,000 hours on average they will put out 70 lumens. I looked up what the the xp-g leds (since that is what I am using) state and noticed that they shortened it to 35,000 hours, but that is still almost 8 years with 12 hours on.
In my opinion 2-3 year replacement cycle for leds is unacceptable for the high upfront cost and the pain of replacing 50+ leds. Of course it is a function of you get what you pay for and Cree is more expensive, but also the most reliable with highest efficiency (135 lumens per watt on xp-g). Hope that helps.

Thanks for the info! From everything I've read yes CREE LEDs are the best of the best RIGHT NOW. I'm sure in a year or so there will be others that are just as good if not better. Is there any link to some data on the CREE degradation period?

 

[lmn420]

Thanks for the info! From everything I've read yes CREE LEDs are the best of the best RIGHT NOW. I'm sure in a year or so there will be others that are just as good if not better. Is there any link to some data on the CREE degradation period?

http://www.cree.com/products/pdf/XLampXP-G.pdf
search for lumen maintenance projections.
http://www.cree.com/products/pdf/XLampXR-E_lumen_maintenance.pdf
goes into a ton of detail on the xr-e which has been in production long enough to have long term testing info.
Of course they are just the best right now, heck they even have leds coming to market in the next year that are about 200 lumens per watt. As time goes by all the competition will drive prices down and performance up.

 

[dragoneggs]

I've got two of these on my new build.

 

[roscoe]

http://www.cree.com/products/pdf/XLampXP-G.pdf
search for lumen maintenance projections.
http://www.cree.com/products/pdf/XLampXR-E_lumen_maintenance.pdf
goes into a ton of detail on the xr-e which has been in production long enough to have long term testing info.
Of course they are just the best right now, heck they even have leds coming to market in the next year that are about 200 lumens per watt. As time goes by all the competition will drive prices down and performance up.

Thanks for all the links bro! There are some great info there. Exactly what I was looking for. Thanks again