Yeah, no, if that thing was pushing 5000 lumens, it'd melt or burn your forehead. I'd believe 1000 if a trustworthy site measured it, but I'd guess 200-500 given the photos and sane thermal characteristics.
@myself lol, it would be hot enough to make it uncomfortable possibly leave a mark. I am weary of these kinds of head lamps. Not saying it won't work but I am usually active with my headlamps. Except the occasional music festival. If i were to bed my life on it camping no i would not after looking at some of the reviews. The following " **as a product tester this product was received at no cost to inspect and provide an honest review " is found on here common enough for it to be mentioned on as the most common review means someone is doing the review to make money.
A lot of headlamp for $8 but maybe too much. I mean I'd as soon have only a single XM-L LED and the savings from deleting the other two put into thicker elastic or a beefier battery compartment, major brand cells, etc.
For those feeling tempted, there are a good number of reviews for this type of headlamp on youtube. Note that many sellers claim all 3 LEDs are XML T6, which doesn't make sense given how the side LEDs have a much smaller heat sink than the one in the middle.
I like the fact that it uses 18650 batteries. Two of them is good.
I already have a number of them, and a charger. They last for quite a while.
I just ordered this light. It should work much better than the one I have, which uses AA batteries that don't last much.
I like the fact that it uses 18650 batteries. Two of them is good.
I already have a number of them, and a charger. They last for quite a while.
I just ordered this light. It should work much better than the one I have, which uses AA batteries that don't last much.
just a note about these batteries, All the drills on the market that have lithium batteries use 18650 inside the plastic casing, usually one one battery goes bad. Get those drimal motors out and split open the case, then separate the batteries. Test them with an OHM / voltage meter. Throw away the bad 18650's and you will have a hand full of good ones.
I like the fact that it uses 18650 batteries. Two of them is good.
just a note about these batteries, All the drills on the market that have lithium batteries use 18650 inside the plastic casing, usually one one battery goes bad. Get those drimal motors out and split open the case, then separate the batteries. Test them with an OHM / voltage meter. Throw away the bad 18650's and you will have a hand full of good ones.
Better not to do this. When integrated into consumer products, 18650 don't have a separate protection board on each cell, instead depending on the whole battery board to do this. Cheap flashlights do not have any protection for the cells so damage to them can result which with Li-Ion means a potential fire.
Granted, in this particular light, if it runs them in parallel instead of series, the risk is reduced because they will drop below the forward voltage of the LED before drained to a damaging voltage.
This matters less with good chargers because they will detect the problem and refuse to charge the cells, but the charger on this kit is not likely to be that sophisticated.
Maximum power: 10W
Maximum light output: 1040 Lumen
The efficiency at full power is 1040 / 10 = 104 Lumen per Watt. To get 3000 Lumen you have to drive 3 XM-L T6 LEDs at 10W each. Assuming 85% efficiency in the LED driver you need 35W from the batteries. You cannot safely get anywhere close to 35W of electrical power from a pair of 18650 batteries. Then there is the issue of heat sink size. That torch is simply too tiny to support LEDs running at anywhere close to 30W.
I like the fact that it uses 18650 batteries. Two of them is good.
just a note about these batteries, All the drills on the market that have lithium batteries use 18650 inside the plastic casing, usually one one battery goes bad. Get those drimal motors out and split open the case, then separate the batteries. Test them with an OHM / voltage meter. Throw away the bad 18650's and you will have a hand full of good ones.
Not all of them use the 18650. Many use the C-size batteries wrapped in some tape. I use my 18650s in a Cree UltriFire small, but very powerful flashlight. It takes one 18650, or three AAA batteries. So I use the 18650s. I take 6 of them when I go camping.
Comments & Reviews (25)
Maybe a decent backup, for the backup.
Worst case scenario: A Merry Christmas to you, Son.
I already have a number of them, and a charger. They last for quite a while.
I just ordered this light. It should work much better than the one I have, which uses AA batteries that don't last much.
By the way, Yepppeeeeeeee I have another flashlight.
just a note about these batteries, All the drills on the market that have lithium batteries use 18650 inside the plastic casing, usually one one battery goes bad. Get those drimal motors out and split open the case, then separate the batteries. Test them with an OHM / voltage meter. Throw away the bad 18650's and you will have a hand full of good ones.
Only until they overheat.
Better not to do this. When integrated into consumer products, 18650 don't have a separate protection board on each cell, instead depending on the whole battery board to do this. Cheap flashlights do not have any protection for the cells so damage to them can result which with Li-Ion means a potential fire.
Granted, in this particular light, if it runs them in parallel instead of series, the risk is reduced because they will drop below the forward voltage of the LED before drained to a damaging voltage.
This matters less with good chargers because they will detect the problem and refuse to charge the cells, but the charger on this kit is not likely to be that sophisticated.
You are misinformed about the XM-L LED specs. See here:
http://www.cree.com/LED-Components-and-Modules/Products/XLamp/Discrete-Directional/XLamp-XML
Maximum power: 10W
Maximum light output: 1040 Lumen
The efficiency at full power is 1040 / 10 = 104 Lumen per Watt. To get 3000 Lumen you have to drive 3 XM-L T6 LEDs at 10W each. Assuming 85% efficiency in the LED driver you need 35W from the batteries. You cannot safely get anywhere close to 35W of electrical power from a pair of 18650 batteries. Then there is the issue of heat sink size. That torch is simply too tiny to support LEDs running at anywhere close to 30W.
A little late for that, Skippy.
Empty your house of Chinese goods....you'll understand how late you really are.
Not all of them use the 18650. Many use the C-size batteries wrapped in some tape. I use my 18650s in a Cree UltriFire small, but very powerful flashlight. It takes one 18650, or three AAA batteries. So I use the 18650s. I take 6 of them when I go camping.
Thank you!