XP-E Cree LEDS

[Mando77]

I just ordered 29 of these guys and was amazed they are 75% smaller than the XR-E's and produce up to 22% more light, and because of the footprint they are suppose to have less heat. I will take before and after shots. I will run 10 white, 14 royal blue on a meanwell ELN-60D and run 5 regular blues on a Meanwell ELN-30D and have them set up on the Apex for sunrise sunset simulation. Should be very nice.

[Guest thefishman65]

It depends on the bins. The XR-Es can by as bright as the XP-E, but it is hard to find the brightest bins. And actually if you are not using lenses the XR-E maybe more efficient even at a lower bin because they spread their light over a smaller area.

[Swimboy123]

I'm just starting to learn about LED's. What is a bin?

[Jager]

bin is a term that is used to explain this type of scenario

 

manufacture makes 200 electronic items. they should put out X amount of whatever

 

manufacture tests said items and 95 make x amount correctly they are put in a bin labeled for those specs.

 

the 5 that produced y are not discarded or melted down, but if they produce less they are downbinned and put in a bin for Y amount (assuming they meet those amounts)

 

manufactures from computer processors to leds make giant amounts of stuff then the stuff that doesnt test to spec, is tested at lower voltages or slower speeds and then marked and sold as the slower type or less bright.

 

a good easy example is a pc should run at 3000mhz. the manufacturer also sells a 2000 mhz chip/pc. some of the 3000mhz chips only run 2500mhz, so the manufacturer turns the speeds down to 2000mhz (even though it is a faster chip) and sells it as the slow model. this allows manufacturers to not lose tons of money on the massive runs of chips or leds or w/e when some do not pass quality control at a certain level but will pass QA at the lower. we consumers also sometimes find out that manufacturers who couldnt sell the super fast or brightest item have lowerered their specs and sold them as the slower models EVEN though they pass the higher QA jut to make room for the new stuff.

 

If you follow or are into overclocking PC's the binning process and its various steps and screw ups are closely followed.

 

apologies for the long post but figure more info is better.