Best Bike Lights On Amazon | Best Mountain Bike Lights | 5000 Lumens 5 Beam VA-B04 

depending on price could be good for an hour or so in the woods after dark, would be interesting to see an actual lumens test because so many amazon specials have wonderous claims of 10,000 lumens etc but only output about 800 also don't know if the mount would handle drops/jumps and rough terrain on the trails.

Well you can still use it on the street with only the 2 diffuser beams on a lower level. I believe the lowest setting is around 500 lumens which is more than weak enough(actually a bit weak really) to be just seen on the roadway. The diffuser beams will diffuse the light to such a level that it won't cause glare. I had sort of a similar Yosky light with the same mount and internal batteries which were way more heavier than just that light by itself and I went off roading with it no problem so with an even lighter light I don't see any problem with it keeping stable on the bike unless you have a childrens bike with coat hanger wires for handle bars. This looks like an old Magicshine Monteer 5000S copy. Since that light is old, this light is probably close or near the 5000 lumen mark as they've had enough time to copy it without having to resort to outrageous claims. In fact I wouldn't be surprised the original contractors to make the old Magicshine Monteer 5000S lights just directly copied the light after the manufacturing contract was up. Happens all the time in China. So it's probably an "unbranded" or whatever brand you want to put on the light, ie. Acrunu sells the same light, Monteer 5000S stolen from Magicshine with some minor differences, enough to not get sued. Ie. Different buttons, simplified UI, simpler battery, cheaper construction, etc. Which means it's probably good. Or at least good enough. In fact looking at the specs/modes it's almost exactly the same as the Magicshine except they've done away with the eco functions which probably saves a few bucks on the electronics and it doesn't look as high quality or as refined as the Magicshine, but if it works the same who cares? I'm a computer tech with alot of instrumentation. I'm kind of interested in this light. If I get one I'll really test the battery capacity, etc. I'm assuming to get to that 5000 lumens level it has 4 cells in 2 parallel and 2 series to get up to 7.4v. Without having it in my hand and testing it I can't really tell. Also I'm not sure if the batteries in there are 18650's or 21700's. If they are 18650's there is no hope in hell it's a 20000mAh battery pack(really 10000mAh pack at 7.4v in series). You would need 21700's at least and good ones. The battery pack does look thick enough for 21700's but I'd have to test them. For example my 3000 lumens(They claim 6000, it's not I tested it, it's 3000) LIG08 light bar setup from Newbowler claims 10000mAh and they are actually 21700's but they are grade B cells otherwise the light would be double. But they are fairly ok with grade B's in there as it has a real capacity of 8756mAh until low voltage cutoff at 2.8v. So for grade B's that's not too bad at around 87.5% of capacity(add 10% for total dead). Anything over 80% is acceptable for grade B's until low voltage cutoff which I hope this light has or you will kill the cells much quicker. If I get one of these lights I'll post it on my tech channel.

Does it get darker over time to control the heat? Thats the Problem i have with most lamps ... thx

I can't see a UK link to where to buy this light via Amazon? Truth be told, I cannot find this product on Amazon, period. Please advice.

What brand?

How much?

Is it REALLY 5k lumens though?

This is not for a mountain bike like, it would fall off in no time?

Плохая вторичная оптика -много фотонов в никуда улетают.

If your riding around your town or on roads with traffic dont use a 5000 lumen light you will blind oncoming drivers