bin T6 ... 280-300lm/700mA ...
luminous flux:
700mA = 100% = 280lm
2000mA = 240% = 672lm
3000mA = 325% = 910lm
Cree does it again-160 lumens per watt @350 mA
- Thread starter saabluster
- Start date
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bin T6 ... 280-300lm/700mA ...
luminous flux:
700mA = 100% = 280lm
2000mA = 240% = 672lm
3000mA = 325% = 910lm
znomit
Enlightened
Remember the XPG... initial release with S2 bin in "limited" supply... seen in the wild but can you buy one today?
NOOOOOOOO !!!!!!!!!!!
Techjunkie
Enlightened
900 CREE lumens at 3A vs. Phatlight's not quite 1000 lumens at 5A, and from a smaller, more focusable die? yes please.
I can understand some disappointment over the 750L at 2A rating being dropped to only 700L @ 2A, but still, it's nice to see the added headroom for overdriving to 900L @ 3A on the preliminary charts above. That's definitely a step above the SST-50 in my opinion. In fact, I'm already planning to swap the SST-50 from my modded SacredFire V-65C for a CREE XM-L.
Of course, now I'll have to change the sense resistors on the DX 20330 2.5A drivers I had planned to use in some Mag mods. :naughty:
I can understand some disappointment over the 750L at 2A rating being dropped to only 700L @ 2A, but still, it's nice to see the added headroom for overdriving to 900L @ 3A on the preliminary charts above. That's definitely a step above the SST-50 in my opinion. In fact, I'm already planning to swap the SST-50 from my modded SacredFire V-65C for a CREE XM-L.
Of course, now I'll have to change the sense resistors on the DX 20330 2.5A drivers I had planned to use in some Mag mods. :naughty:
Corvette6769
Newly Enlightened
My thought exactly, with all this talk about 3A, I was wondering what manufacturer was going to offer a single 18650 flashlight or drop-in that would drive the XM-L at 3A, since most everything out there today is driving the MC-E and SST-50 at only 2.5A.
750lm at 2000ma seems to scale out about right for the top of the bin. Keep in mind the listed spec is a minimum not the typical or top of the bin so calculations should be done at 300lm@700mA in order to see if they match the prior stated spec of 750lm@2A. The graph may have been based on the lower bin which would have more droop as the power rises and therefore the higher bin will not scale dead on to that graph.
Also keep in mind that 3A is probably not going to be the maximum drive level for too long. It will probably go up to 4.5-5A once their testing qualifies it at these drive levels. It is also interesting to note that in the original press release from earlier this year they said the XM-L had a thermal resistance of 2 degrees C per watt and the datasheet shows it at 2.5. That's a bummer for the overdriving crowd.
Also keep in mind that 3A is probably not going to be the maximum drive level for too long. It will probably go up to 4.5-5A once their testing qualifies it at these drive levels. It is also interesting to note that in the original press release from earlier this year they said the XM-L had a thermal resistance of 2 degrees C per watt and the datasheet shows it at 2.5. That's a bummer for the overdriving crowd.
fair enough, but it is a preliminary data sheet. Also remember that those are the minimum specs for T6.
Well the S2 quark range has just been released.
ergotelis
Enlightened
I guess you have your own tests with the samples, are you allowed to speak about them?Thanks anyway!
... after one year ...
HumanLumen
Newly Enlightened
I don't expect the current to be increased beyond 3 amps, as the XPG (which is half the size - correct?) was only scaled up to 1.5A. All speculation of course!
HL
HL
ergotelis
Enlightened
exactly, that is just a speculation, if you check out the thermal resistance, in XM-L is much much better, so we can't compare these two products in that way.
c
Corvette 6769:
Peak drives the FR1000 using the Seoul P7 at 3.4 amps, however that requires more battery than a single 18650.
Two 18350 will work for a short period of time, but for that amount of drive, two 18650 batteries or four CR123A
batteries are required. The state of the art in batteries at this time is not up to the requirements that we would
like to see. Even using two 18650 batteries in the FR1000 or the FR1200 driving the SST-50 at 5.1 Amps,
the batteries get very warm. The Peak SR1500, SR2400, and the SR6000 will all use the 'M' cell, (38120),
Iron phosphate Lithium-Ion batteries for power or a remote SLA battery.
As far as driving the XM-L at over 3 Amps, that will be a technical challenge as to the thermal problems
associated with 10 watts plus of power, concentrated in what proports to be a point source given the surface
area of the LED's heat pad. Driving the LED on a test bench is not the same as inside a flashlight head and
the thermal path to the surface of the light. Ideally we would like 80 square inches of surface area to dissipate
8 watts of heat energy when driving the LED with 10 watts of power. In a Luminare fixture that is not a
problem as to thermal radiation dispersal. We work, design and live under a different set of rules.
Curt
Corvette 6769:
Peak drives the FR1000 using the Seoul P7 at 3.4 amps, however that requires more battery than a single 18650.
Two 18350 will work for a short period of time, but for that amount of drive, two 18650 batteries or four CR123A
batteries are required. The state of the art in batteries at this time is not up to the requirements that we would
like to see. Even using two 18650 batteries in the FR1000 or the FR1200 driving the SST-50 at 5.1 Amps,
the batteries get very warm. The Peak SR1500, SR2400, and the SR6000 will all use the 'M' cell, (38120),
Iron phosphate Lithium-Ion batteries for power or a remote SLA battery.
As far as driving the XM-L at over 3 Amps, that will be a technical challenge as to the thermal problems
associated with 10 watts plus of power, concentrated in what proports to be a point source given the surface
area of the LED's heat pad. Driving the LED on a test bench is not the same as inside a flashlight head and
the thermal path to the surface of the light. Ideally we would like 80 square inches of surface area to dissipate
8 watts of heat energy when driving the LED with 10 watts of power. In a Luminare fixture that is not a
problem as to thermal radiation dispersal. We work, design and live under a different set of rules.
Curt
Notsure Fire
Enlightened
- Joined
- Jan 7, 2008
- Messages
- 272
All I know is that I'm upgrading soon!
Corvette6769
Newly Enlightened
Since we are limited to 2.5 A to 2.8A with a single 18650 (and since anything bigger is not practical for every day carry), I believe the key to greater output will be more efficient, higher output LEDs such as the Cree XP-G S2-bin providing up to 400 lumens at 1A - http://www.cree.com/press/press_detail.asp?i=1254314703656 (493-520 lm @ 1.5A) , Cree MC-E O-bin (980-1103 lm @ 2.8A), Luminus SST-50 K-bin (1410-1645 lm @ 5A), XM-L T6 or T7 ...
ergotelis
Enlightened
Except S2 bin of xp-g and XM-L T7, i don't think that all the rest that you mention will ever exist.
