5000 Lumens XM-L U2 LED Bicycle Light with 8.4V Battery Pack & Charger 4 Modes Waterproof LED Bike Lmap Headlight Super Bright Lighting Lamp for Outdoor Sports Like Cmaping Hiking(Black)

Super bright LEDs mounted side-by-side in an aluminum heatsink body are perfect for wearing on a headstrap to illuminate night time snow blowing, mowing, bike riding, or walking. Lights are incredibly bright. You do not want to look into them directly.Battery pack came with nearly full charge. Battery-to-light plug is a male-female with a threaded joint. Finding a replacement could be a challenge.3 user selectable light intensities are provided. The user selects by pushing the button -- low, medium and "burn holes through a piece of paper." Pack, as received, was nearly fully charged. Bright white LED strobe effect is activated by holding in the button for a couple of seconds in which ever power level you have selected.Considering the light intensity is supposed to be 5000 lumens I think I will use this in the 2nd brightest mode. I have no way of measuring lumens so I can only tell you these lights are bright. To test the lights I topped off the charge. That took about 30 minutes and hooked up the battery and head gear for an outside, in the dark, test. Attached photo shows how bright the light is illuminating a 220 foot driveway. I am completely satisfied. So, the 5 star rating is for fit, form, function and overall quality. This may change with use.HOW LONG WILL the LIGHT ILLUMINATE?I selected lowest intensity light and let it run for 1.5 hours then stepped it up to high, Battery capacity is communicated by illuminated green LEDS on the back of the light. All three lights lit is fully charged as best I can tell without any instructions. After being discharge for 1.5 hours one of the three lights would go off and on intermittently. I had to go to bed so the battery pack test was stopped.The light is attached to the head strap using a thick rubber band that is akin to a large o-ring. If the one you received let's go an o-ring could be used in its place.SEPARATE RED LEDI will use it as many will use it to face backward on the head gear or attach to back of bicycle to let drivers know you are on the road. The red LED lights are powered by two AAA size batteries. I like this better than having lithium disposable battery. You could always buy rechargeable NiMH cells but I won't bother. It has a clip that be used to clip to the back of your head strap. Lights have multiple modes from constant on to several strobe effects.110 volt charger plugs into your wall outlet and a orange light indicates charging. Full charge is indicated with a green light.As mentioned in other reviews there no documentation but it is pretty intuitive.

For $20.99 free shipping, 2 day (prime member) This light is amazing! I just used it for a 24 hour relay mountain bike race. The pattern is perfect for trail/single track - I used brightest setting for trail and then lowest for double track. I was unable to calculate battery life but my laps were 1.5 hours and it never died. *recharged between laps. I was able to mount to helmet using some "mods" to head strap. You may need to add a little rubber tape to mount to help give it some grip. I love this as a helmet light - not too heavy. Just put battery in jersey pocket of camelback. Works great on bar as well but may need rubber tape to better secure from moving in harsh terrain. Even if these last me one season it's well worth it. Sorry American light manufacturers but these Chinese lights win for those of us on a budget.

Maybe it was just one defective product i understand that that happens.. but it was the best bike light i ever had for 3 blocks the 1st bumb i hit light went off. I took it apart tested everything with my voltmeter as far as i can tell the power switch failed very sad we will see what the seller does for me. Return process is always easy with Amazon but some 3rd party sellers can be a pain...I got a 2nd light and took it apart and used almost a whole gule stick more or less covering the whole board making everything more secure so bumbs dont break it again. So far i got about 50 miles of use on it and i love it for the money it was worth the time to add extra support without doing that DO NOT BUY IT maybe it will work on headban im not sure but it will not work as a bike light unless you mod it. It is worth it though and very easy a glue gun is hot but more than safe just cover the coil are not the TOP of it! Just the board area around it build it up to the height near the top all around the coil and it will never fail! Battery is great i get around 4 days worth of 6miles round trips at highest setting and its very very bright. Another downside is the lense are real glass dont see a big issue there but something to be aware of..So to sum upTHE BAD ; WITHOUT ADDING SUPPORT TO THE COIL ON MOTHERBOARD THIS LIGHT IS WORTHLESS AND WILL 100% BREAK AFTER A BUMB OR 2. LENSE ARE REAL GLASS NOT A BIG ISSUE BUT NEED TO BE CAREFUL!!!??? THE GOOD ???!!!ADDING SUPPORT TO THE COIL IS VERY EASY HOT GLUE GUN 2 MINUTES YOUR DONE.CRAZY BRIGHTLONG BATTERY LIFEFOR THE MONEY WORTH THE TIME TO MOD.maybe not the best light out there but again for the money its great.

Very bright light. Angle of light on headband cannot be set to the horizon. It will point down, at most about 15' ahead of you. Usable but something to be aware of. I tugged to tight on holder for battery and broke the clip. Company quickly sent a replacement. I now have confidence to be out after dark and plenty of light.

Excellent product. Battery life in low level was perfect. Lighting is wonderful I used during ride with several fog 2-3 meters visibility on the low level and it works perfectly. I really recommend this product. I would suggest an improvement on the bag fixation belt.

Has enough battery life to sustain several rides of more than 10 miles. Very very bright, but more of a pencil beam than a spread beam. Cars will take notice of you and will get out of your way, or stay out of it at intersections. Avoids a lot of monkey business I've run into with disrespectful motorists using standard lighting.

Light seems bright. I have yet to use it during the night. Box was missing bungees or securement device on arrival so I will have to Macgyver it a bit to get it to stay on the bike handlebars.