What range of lumens and run times are we getting now for the latest generation LEDs?

Is it around 50 to 100 lumens and 30 mins to 2 hours run time?

1st: that depends on Your power source!

the general max is some 800 mA to the led, what makes about 200+ Lumen,
(exception is K2 with 1.5 A and thus some more lumen for considerably more power consumed, all my following typing does not deal with that led)

in real a single 18650 can power such a led at full power (around 200 lm) for 2 hours + some mins, lets say: 20.

underpowering them - as Your range covers the nominal - to the measured value of a given output at 350 mA drive --> about 95-100 lm for the latest led, ..., that makes some 6 hours


PS: the value at 350 is measured and therefore realtively granted, the max power is calculated, as far as I understand the datasheets.

I meant to say AAA battery

GTSECC said:

I meant to say AAA battery

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You'd get about 100lm-120 OTF from 1AAA for about 30-45mins. The Avg AAA nimh is around 800-900mAh to get 100-120lm OTF you're looking at about 600-800mAh at the LED. With some loss in the driver. This is for a single die. The MC-E or P7 could do this with much better runtime.

50lms you're looking at ~1.5 hours. Same logic but less than half the current values.

tebore said:

You'd get about 100lm-120 OTF from 1AAA for about 30-45mins. The Avg AAA nimh is around 800-900mAh to get 100-120lm OTF you're looking at about 600-800mAh at the LED. With some loss in the driver.

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You're incorrect. AAA Ni-MH has ~850mAh @1,2V. To get 90-100 OTF lumens you must drive R2 at 350mA = 1050mA from battery + driver losses. Boost drivers are not very efficient, 75-80% is very good result. Runtime would be up to 30 minutes with 1200mA current draw.

phantom23 said:

You're incorrect. AAA Ni-MH has ~850mAh @1,2V. To get 90-100 OTF lumens you must drive R2 at 350mA = 1050mA from battery + driver losses. Boost drivers are not very efficient, 75-80% is very good result. Runtime would be up to 30 minutes with 1200mA current draw.

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You're right my numbers were off. I wasn't thinking too clearly and messed up.

Just look at the specs for the E01, L0D-Q4, and LD01.

Does anyone make a P7 or MC-E AAA light?

Does anyone make a P7 or MC-E AAA light?

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makes no sense, especially because this here

This is for a single die. The MC-E or P7 could do this with much better runtime.

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is not correct, there is (were) almost no difference at all

+ a quad-die from a single cell is stupid. Even pushes a Li-Ion cell very hard

yellow said:

makes no sense, especially because this here is not correct, there is (were) almost no difference at all

+ a quad-die from a single cell is stupid. Even pushes a Li-Ion cell very hard

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This is where you're wrong. At 350ma to the LED the P7 and MC-E dies would be seeing around 87.5ma per die which is more efficient than a single die seeing 350mA. At 87.5mA per die you're over 100lm/w (IIRC it's close to 120lm/w)where you're around 97-100lm/w with a single die. If you drive the LEDs are around 100mA then the quad die LEDs are close to 150lm/w. Where the single die is still in the 100lm/w range.

It's not always about driving something at it's hardest, sometimes it's about getting the best efficiency.

But yes no one makes a MC-E or P7 powered AAA light because at that size you could just as easily make a AA or 18650 light.