Is it really 900,000 lumens?

No. The listed spec is 350 lumens, which is a normal brightness for a budget headlamp. The number in the product name is not a real output figure.

How long does the battery last?

The listing gives 1 to 5 hours of operating time, with 2 to 3 hours typical. Expect the shortest runtime on the brightest setting and the longest on low.

It charges over USB from the built-in 2000mAh lithium battery. A full charge takes about 3 to 5 hours.

Can I use it in rain?

It is rated IPX4, so it handles splashes and light rain. Do not submerge it or wear it swimming.

The headlamp and its headband. Check the listing for whether a USB charging cable is included, since that varies by seller.

Is it good for running or cycling?

It works for walking and light jogging, but 350 lumens is dim for fast cycling on unlit roads. Runners who need long runtime should look at a brighter lamp.

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900000LM LED Headlamp Rechargeable Headlight Zoomable Head

Last price we saw

$10.99at eBay, last seen Oct 31

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Our take on the 900000LM LED Headlamp Rechargeable Headlight Zoomable Head

This is a rechargeable LED headlamp with a zoomable beam, five lighting modes and a built-in 2000mAh lithium battery charged by USB. The '900000LM' in the name is marketing; the listed output is 350 lumens, which is a modest everyday light. It runs 1 to 5 hours depending on mode and charges in 3 to 5 hours. No current price was provided for this listing, so there is no price history to compare against.

Best forCamping and walking at nightHome repairs and attic or basement workHands-free car and bike maintenanceEmergency backup light