Re: p60 sized led drop-in's part 2
I picked up the R2 drop in from my local post office this morning.
http://www.dealextreme.com/details.dx/sku.11836
I am performing run-time tests as I type. Its far too well lit here in the office to do any kind of beam comparisons. But I will take some video tonight, and I'll do my best with some beamshots too.
Overall DX ordering procedure went well. I placed the order on 3/27, the module left Hong Kong on 4/1. USPS delivered it 4/8. Not bad at all considering the world wide logistics. The DX www site was updated accurately throughout the procedure. Big cheer for dealextreme.
I am using them with ~450-500mAh RCR123 cells (You know... those highly over-rated ones). These cells have about ~20 charge/discharge cycles on them, and my charger cuts off at 4.2 volts.
On my first pair of cells, The module ran for 50 minutes before emitted light started to turn yellow. For the first 15 minutes the light ran cool to the touch. At about the 20 minute mark the bezel was warm. At 25 minutes the body of the light was warm, and the light continued to heat till the 35 minute point where temperatures leveled off for the remaining 20 minutes. The light body was hot to the touch after the full discharge cycle, much hotter than the DX 6090 which gets moderately warm by comparison. FWIW I had the light on my desk, in a poorly ventilated corner adjacent to my PC monitor pointing at the wall throughout the test. At the end of the run I noticed the batteries were considerably cooler than the body of the flashlight. No doubt the outstanding thermal properties of the brass pill and 6P were doing their job keeping heat away from the LED and RCR123s.
The second pair of cells ran for 45 minutes before emitted light turned yellow. For this test I had the flashlight in an ice water bath in a coffee mug. Clearly the added cooling didn't help extend the run time.
My conclusion is that this module should be used in a host that has good thermal cooling characteristics. You could use it in something less, but doing so might pose some risk to the cells and module over the long-term. Especially with the light ON for long durations. As alarming as it feels, the 6P body is merely doing its job, keeping its contents inside cool.
At some point I will invest in some higher capacity RCR cells, but right now I am content.
Just spent the evening at the park comparing the DX11836 with the DX6090 drop in modules. I also threw my Lowes Cree- task force into the mix, more as a control reference. It seems to be a somewhat popular light here and from what I've read spits about 110L out the front. I thumb nailed the higher-res pics, that way you guys can see some of the details of the images and shadows.
http://www.dealextreme.com/details.dx/sku.6090
http://www.dealextreme.com/details.dx/sku.11836
Host: SureFire 6P, completely OEM (no mods)
Cells: Ultrafire RCR123x2
Task Force, P4 emitter, Fraen optic
DealExtreme, SKU6090, P4 emitter, OP reflector
DealExtreme, Sku11836, R2 emitter, OP reflector
Task Force, P4 emitter, Fraen optic
DealExtreme, SKU6090, P4 emitter, OP reflector
DealExtreme, Sku11836, R2 emitter, OP reflector
So... the Cree R2 is considerably brighter and whiter tint than the P4. I think if the P4 has one strength, its that it presents a very near-sunlight kind of tint, which may appeal to some. The R2 however throws out farther, although my pics don't clearly illustrate that. The flood from the R2 is also noticeably brighter.
Phwew... taking these pics was a
lot harder than everyone else makes it look. I dumped about 20 images that were either blurry, off center or just plain unusable.
Hope some of you find this useful..