Rebel shortages...

[cadstarsucks]

It is confirmed, the flashlight industry is sucking up the Rebels:  Kmart now carries a 2AA 80Lm Rebel flashlight for $30. 

[justDIY]

Philips is building LCD tv's using them too - so they're probably dipping into the top bins before making them available to the rest of us.  Sites like luxeonstar appear to be pooling orders and then purchasing reels.

[cadstarsucks]

Philips is building LCD tv's using them too - so they're probably dipping into the top bins before making them available to the rest of us.  Sites like luxeonstar appear to be pooling orders and then purchasing reels.

That makes sense...hopefully we will have a customer doing reels of them soon.  Then I can get them for play regularly .  I have convinced him to go with the HV9910 and they are trying to get him away from the Luxeon III stars since they do not really want to supply them that way. 

I did a light output comparison that proved the Rebels put out as much light at half the power beyond the junction equal to room temp value, and since he is looking at outdoors under full sun it actually is quite applicable to him.  For now he is still using the IIIs, but if things really take off for him we will probably be mounting rebels for him in at least 25pc panels.

Dan

[minster9]

I'm waiting until the rush is over. Ain't much nice weather left to fly my rc heli,I'm hoping the 145lm neutral whites are a little cheaper towards the end of the year if they become availible. I still have a huge heat sink waiting for 6 of 'em. I use the lamp regularly w/identical sink (no fan needed) that I built last winter using 95lm neutral white rebels @ 700ma. The base gets pretty warm (3 1/2" x 2 1/2" x 1/2" thick,20 fins extending 2 1/4" from base),you can lay the backs of your fingers on it all day without discomfort. I'm gonna have to start building my own drivers,though. I like the convenience of prepackaged drivers,but they end up being a major part of the cost of building a led array. I have plenty of light for my "led worktable",but one of earlier lamps only has 4 rebels & is fan cooled. I want a matched set 6 on each side. The noise from the older fan-cooled unit is annoying,even though I know it may outlive my newer passive units. I just hope they have their epoxy problems solved.

[justDIY]

they've been out for more than 2 years now, and the "rush" is still on - it won't be over until someone comes out with something better.  I doubt Phillips is gonna spend billions to build a new fab to increase production, since they know new technology is just around the corner that'll blow these little heaters out of the water.

[minster9]

 ;Dyou guessed her,chester. My nickel to your dollar "someone" will top Phillips. Mmmmmm,a couple months. I don't own any stock nor trade,I watch.

[justDIY]

On that note - the Cree XP-E (rebel killer) actually shows up in Arrow's catalog now.   Of course, it shows up as sold out, but hey, the flashlight folks are a hungry crowd.  I'm going to have to call up my local Arrow contact and see if I can snag a few of these to play with.

The XP-E Q4 bin offers 100lm/watt, and about 180lm at 2.5 watts (700ma.)   The specs show 2.5 watts as the max.  I know the rebel can go to 3 watts (1000 ma), but I don't recall what its output is at that level.   These specs seem to be slightly better than the SSC P4 led U-bin which offers the same 100lm at one watt, and 200lm at 3 watts.  Of course, the XP-E is smaller (3.5mm square.)  The solder pad layout makes me think the XP-E would be easier to hand solder than the rebel.

[cadstarsucks]

On that note - the Cree XP-E (rebel killer) actually shows up in Arrow's catalog now.   Of course, it shows up as sold out, but hey, the flashlight folks are a hungry crowd.  I'm going to have to call up my local Arrow contact and see if I can snag a few of these to play with.

The XP-E Q4 bin offers 100lm/watt, and about 180lm at 2.5 watts (700ma.)   The specs show 2.5 watts as the max.  I know the rebel can go to 3 watts (1000 ma), but I don't recall what its output is at that level.   These specs seem to be slightly better than the SSC P4 led U-bin which offers the same 100lm at one watt, and 200lm at 3 watts.  Of course, the XP-E is smaller (3.5mm square.)  The solder pad layout makes me think the XP-E would be easier to hand solder than the rebel.

GRRRRRRRR.... you are better than playing sheep to the shepherds in the marketing dep!

Not to mention my having explained it before!

The rebel puts out more light in equivalent REAL conditions than the XP-E. 

At 50 degrees ambient (120F...a hot summer)  with an 10 D/W heat sink the rebel puts out 180Lm times 0.9 for temperature rise or about 162Lm.

Using the same heat sink you might think you can use the same temperature to look it up on the graph for the XP-E, but you would be wrong!  While the Rebel specifies all ratings at 25C THERMAL PAD temperature and the XP-E (and most semiconductors, BTW) specify ratings at 25C DIE temperature.

Instead of a 75C thermal pad you have a 100C die temperature to look up.  The result is 170Lm times 0.83 or 142Lm.

If anything the XP-E is lower in output at about the same price.  My sources show it harder to get in low quantity, mind you being the late comer it is easier to get reels of, but the marketing departments claiming it is the rebel killer is entirely uncalled for