Thrunite TN31 drops from 1147 lumens to 809 under its temperature controller and do not use CR123s in TN30 & TN31.

[turboBB]

@OP - selfbuilt has addressed this on your original thread over on the other forum. No huge dip even without a fan.

I believe that potentially the reviewer may have received a poor unit or one with high vF. In which case, anecdotal evidences suggest that differences in vF can cause a 40% differences in output with all else being equal.

I don't have time to conduct a run now as I'm wrapping something else up but will post my results in the future.

Cheers,
Tim

[my9221]

@Sparkymarky1954

I have seen warnings on CPF about DX and Dino, but what is the main bad points that BLFers have found?

Welcome to BLF. Please do some home works for DX & DD on BLF. You'll find plenty of interesting forums regarding these Chinese supplies!

[luvlites]

@Tecmo

We need more beamshots!

Selfbuilt's got some decent beamshots in his TN31 review on "the other site" and compares it to beamshots of the TN30, Catapult V3, Crelant 7G5V2 and Olight SR90.

I'll do some longer distance shots than his when I have time and will compare to the HD2010, Ultrafire Uf-T70, etc.

[antonkochubey]

As I can see by the purple line, there's only 1 step-down at 2-3 minute mark, after all it's basically a straight line.

[Rusty_Joe]

@luvlites

@kramer5150

So if it gets 73400Lux from 809 Lumens, then by the time it drops to 695 Lumens the corresponding Lux will have dropped to 63,056Lux (Assuming its a linear correlation).

Thats not that much brighter than an STL-V2, Fandy-V6 or modded HD2010... which all can push the 45-50K range, at a fraction of the price and ~half the size size.

It's definitely not 809 lumens. His light is defective or his testing is wrong. Trust me, I own one of these. BTW it puts out 3X the lux of an HD2010 which I also have and have tested it against.

Holy crap! That's all I gotta say!

[Hikelite]

If you look at HKJ's review you can see two step downs. Bu it looks like the second drop is only down by 14% of the initial output, keeping constant approx 986 lumens, considering that HKJ estimates the same brightness as the manufacturer.

[kramer5150]

@luvlites

@kramer5150

So if it gets 73400Lux from 809 Lumens, then by the time it drops to 695 Lumens the corresponding Lux will have dropped to 63,056Lux (Assuming its a linear correlation).

Thats not that much brighter than an STL-V2, Fandy-V6 or modded HD2010... which all can push the 45-50K range, at a fraction of the price and ~half the size size.

It's definitely not 809 lumens. His light is defective or his testing is wrong. Trust me, I own one of these. BTW it puts out 3X the lux of an HD2010 which I also have and have tested it against.

Yeah thats more along the lines of what I was expecting for a reflector that big.

[Woody]

So probably best not to bid for this specific light on eBay (all the lights sent to Light-Review seem to end up on there). Not that cheap either.

[raccoon]

Welcome to the best damn light forum period, Sparkymarky1954!