Guys, it’s been a while since I’ve posted here but I thought of you immediately after seing this video :
300 XHP70 ? meh
Nice to see you posting something again, fun video! And pity that they did not even do a half-serious attempt to measure the output.
Edit: in the picture above it says 1.414.000 lumen, sounds plausible but in the video it is not explained how it is measured. If it is just multiplied from the Imalent output by the number of leds, it must be a bit less because their light extraction will not be as good as the Imalent.
hahaha that’s great!
Anyway Imalent is clever with their advertisement, it’s the second video that I see with the MS18 subtly place as the “most powerful flashlight you can buy”
They could have used our 500 watt engine with built in temp sensing to get more than 7 seconds
we didnt design the mS18 board, ours is a 150M + dive light module
Damn, you bet me. I re-posted without noticing this thread
A drone shot would’ve been nice. Can’t really tell how bright it is in the video.
That was an awesome video. Thanks for posting!
I enjoyed the heck out of that!
I have a hunch that the part of the video where the radiometer gets melted was faked. In terms of “photon density” (aka lumens per square meter aka lux) the Hacksmith light and the MS18 are nearly identical. This is the quantity that determines how much heat a beam of light produces.
Guessing the bezel diameter at 57 cm and taking their 1.4M lumen number at face value that is 5.5 million lux. This is probably an overestimate because the lumen number is suspect.
The MS18 is 15cm and 100k lumens. That is 5.6 million lux. Close enough to the same.
Note these are 55x more powerful than the sun! Stuff can catch on fire at those levels. Though it shouldn’t be enough to melt glass.
Someone could test this for themselves with a mule XHP70.2 and a glass microscope cover slip.
Wow…
I’m not sure that’s quite accurate.
LUX is a measure of throw. At a distance you are correct. But when measured inches from the bezel you might not be. The cone of light from each emitter in a mule configuration is quite wide. Put 300 of them together and then stand the target close enough to get light from a large portion of them, I think it could be hotter than an MS18, despite similar lux at distance.
Another example: A Noctigon KR4 with 4 emitters is much lower lux than a Noctigon KR1 with 1 emitter. But if you put a burnable object right in front of the bezel of each light and turn them on the KR4 will burn things much faster. This is because there is much more light coming out of the bezel in the quad. Lux doesn’t matter since the light has not traveled far enough to diverge into a flood pattern.
No. That is candela.
My math is correct at a single distance. In this case the distance is 0 inches.
No. You are thinking of candela. The KR4 does 3000 lumens across a 29mm bezel. That is 4.5 million lux. The KR1 does 1300 lumens across a 35mm bezel. That is 1.3 million lux. These numbers are only accurate at a distance of 0 inches.
Those are astute observations. Yeah the table should have scorched and the plastic lens should have melted.
The 1 camera angle is easy to explain however. They were using a high speed camera to film that shot. Those cameras can easily cost $50k so usually people don’t have several of them. If they wanted multiple angles they would have needed to do the shot multiple times and destroy several $30 radiometers and that would have been a frivolous waste of money for these guys.
It’s a fun build, but I feel like they avoided showing any direct comparison of the output to the MS18, were they disappointed in the result? In the stadium, they never showed the beam. They showed the beam of the MS18, but for their light they only showed it directly from the side, and looking back at the glare from downrange. In the shop it was very overexposed and vague. This is way more drama than science.
Also those electronics are a mess, they could have used a higher voltage and eliminated a lot of drivers and wiring. Why did they custom design and print PCBs for the LEDs and then use cheap off-the-shelf drivers and 5V regulators?
It was an impressive mod. These guys got the $$$ so I don't think Imalent was a sponsor, just google: "worlds brightest flashlight"
Loved the drive around town on the roof!