Don
(Don)
August 17, 2010, 3:43pm
1
Forgot about this one. Time for a review. At the moment gathering data so will tidy this up into a review when I've got the info.
For the price this one deserves about 7 stars on a 5 star scale. See here for the full story. It cost me $5 plus postage.
At switch-on
At 30 seconds
At 2 minutes
At 5 minutes
At 10 minutes
At 32 minutes
At 60 minutes
Lux Readings
1462
1380
1323
1287
1251
1178
1094
Calculated lumens
325
307
294
286
278
262
243
Runtime on high going just now.
Don
(Don)
August 17, 2010, 4:54pm
2
Down below 50% but still a lot of light - 617 lux / 137 lumens
Looking forward to your review. The MRV's have been my most used 18650 lights since I bought them... and also my least expensive 18650 lights.
Don
(Don)
August 17, 2010, 5:24pm
4
You really couldn't beat that price! The pair of red/black Ultrafire cells I just ordered cost about the same as two of these.
Don
(Don)
August 17, 2010, 5:38pm
5
Down to about 23% - 294 lux / 65 lumens
Stopped the test at 14 microamps as was concerned about the cell voltage. The cell was down to 3V which is low enough for an 18650. Runtime at this point was 2 hours and 10 minutes. Generating graphs now.
Medium runtime started - 586 lux / 130 lumens
Don
(Don)
August 17, 2010, 5:54pm
6
Runtime done with a grey unprotected Trustfire "2500mAh" 18650.
http://www.dealextreme.com/details.dx/sku.19770
Oops I see I forgot to put in the runtime percentage. Conventionally runtime is to 50%
charlestt
(charlestt)
August 17, 2010, 8:21pm
7
Not bad runtime there, thanks for doing that Don.
I had mine running for an hour today just to see how hot it got and i was surprised that seeing how bright it is it doesn't get that hot..
Are everyone else's like that? i was easily able to hold mine after an hour on full power without any discomfort.
Charles
Don
(Don)
August 17, 2010, 8:34pm
8
Still at 67% after 3 hours - 2500mAh 18650 medium
Down to 420 lux / 93 lumens
Heat: Because I don't disturb it during runtimes I couldn't say. But I've not noticed it getting hot in use. When I ran it last night to see how the brightness fared, the whole thing was pretty warm after sitting on the desk for half an hour, but wan't in the hand-burner category.
XRAYBoY
(XRAYBoY)
August 17, 2010, 8:47pm
9
You can test it with 2xCR123A?
I not say do the complete test, but see if it is brighter at first moments with these batteries?
With your permission, I stole the plot of data for our forum. ;)
Great job (as usual) Don.
Don
(Don)
August 17, 2010, 8:52pm
10
XRAYBoY:
You can test it with 2xCR123A?
I not say do the complete test, but see if it is brighter at first moments with these batteries?
With your permission, I stole the plot of data for our forum. ;)
Great job (as usual) Don.
Feel free to take any of the data. Most of it probably won't need translation and anyone is welcome to use it for any non-commercial purpose.
I'm happy to try it with 2xCR123A. I'll be interested to see how it gets on.
Since it is doing a runtime just now that looks like it is going to take a while, it won't be tonight - I only have one lightbox.
XRAYBoY
(XRAYBoY)
August 17, 2010, 9:07pm
11
Ok take your time and thanks.
I use it with the CR123A, but I've been in the car for very specific uses (so far) and mine no longer has the original driver or led.
Just be careful with the 2xCR123A. I do not know the efficiency of the driver but it might warm up considerably more at 6v in continuous use.
Don
(Don)
August 18, 2010, 6:58pm
12
6 hours 30 minutes on medium 98 lux / 22 lumens. Not bad going. Official runtime to 50% around 5 hours. This is quite impressive. Runtime on low should be quite a long time.
Don
(Don)
August 18, 2010, 7:58pm
13
7 hours. 67 lux / 15 lumens though I'd have thought it was a bit more. Time to stop before I over discharge the cell. Cell down to 2.9V
Don
(Don)
August 18, 2010, 8:27pm
14
It had just been runnning on medium for seven hours so the pill was slightly warm before the start of the test. IT wasn't any warmer at the end of the test. But then it wasn't any brighter than it was with an 18650 anyway.
Here's a graph of the output for the first minute.
Time
Lux
Lumens
Switch-on
1409
313
30 seconds
1289
286
1 minute
1178
261
Don
(Don)
August 18, 2010, 8:26pm
15
Long. At least long by my standards ;)
Still producing usable light at 7.5 hours.
Don
(Don)
August 18, 2010, 8:31pm
16
Low runtime starting. Back some time tomorrow. Initial output 110 lux / 24 lumens
Don
(Don)
August 18, 2010, 9:35pm
17
4 Seconds ISO 80
The tree is 17m / 50' away. The tree top is around 21m / 65' away
Control
High
High Treetop
Medium
Medium Treetop
Low
Low Treetop
Don
(Don)
August 18, 2010, 10:42pm
18
102 lux / 23 lumens. Or basically next to no drop. It started out at 110 lux / 24 lumens
I fully expect this one to be going at lunchtime tomorrow - it is just shy of midnight here.
Don
(Don)
August 19, 2010, 11:04am
19
78% brightness 84 lux / 19 lumens
15 hours 80 lux / 18 lumens 73%
Don
(Don)
August 19, 2010, 4:38pm
20
20 hours and still going strong. 77 lux / 17 lumens. Looks like it will make a day..