Nitecore NU25 UL 400 Lumen Headlamp: Weight, Price and Alternatives

The Nitecore NU25 UL 400 Lumen Headlamp is our beginner tier pick in headlamps and electronics, with a published weight of 1.6 oz and a listed price of $36.95. Under two ounces with the battery built in, 400 lumens on high, and a red mode that does not blind your tent partner. The single most copied headlamp in ultralight gear lists.

What is the Nitecore NU25 UL 400 Lumen Headlamp actually good at?

Under two ounces with the battery built in, 400 lumens on high, and a red mode that does not blind your tent partner. The single most copied headlamp in ultralight gear lists.

Best for: Camp chores and the occasional hour of night hiking.

Electronics are the category where ounces come off cheaply. A purpose built ultralight headlamp and power bank together save close to half a pound against the consumer versions, and neither one costs much more.

What does it do to your base weight?

At 1.6 oz this item accounts for roughly 1 percent of a 10 lb ultralight base weight and about 1 percent of a 20 lb traditional one. That framing matters more than the raw number: an ounce saved on a headlamp is noise, and a pound saved on a shelter is a category of its own. Put your real figures into the gear list builder and the same item will show you what it costs against your list rather than against an average one.

Published weights are taken in the manufacturer's favour: usually the smallest size, usually without the stuff sack, stakes or guylines that come in the box. Expect a real-world figure an ounce or two heavier and weigh it once when it arrives. A $9 kitchen scale is the cheapest useful upgrade to any gear list, because it stops the spreadsheet lying to you.

How does it compare with the rest of the headlamps and electronics?

Every item below has been verified against the retailer listing, and every weight is the manufacturer's published figure for the configuration named. Sorted lightest first, so the trade between weight and everything else is visible in one pass.

Heavier but more capable: Black Diamond Spot 400-R Headlamp at 2.6 oz, Garmin inReach Mini 2 Satellite Communicator at 3.5 oz, Nitecore NB10000 Gen 2 Power Bank at 5.3 oz. Weight alone never decides this. The lightest option in a category is usually the one with the narrowest window of conditions it works in, which is exactly the trade the roundup spells out tier by tier.

Batteries, cold, and what actually needs charging

Battery capacity drops in the cold, sometimes sharply, so a power bank that covers four days in summer may not cover three in shoulder season, and the fix is to keep it inside your quilt overnight rather than to carry a second one. Work out the real requirement before buying capacity: a phone used for navigation with the screen mostly off is a far smaller draw than most people assume, and a 10,000 mAh bank is two to three phone charges, which covers a standard four day resupply window. A satellite messenger is the one item on this site we would never suggest cutting to hit a weight target.

Which complete kits use it?

This item appears in 4 of the complete gear lists on this site, which is the most useful context a single product page can give you: not what it weighs in isolation, but what share of a finished kit it accounts for and what the rest of that kit looks like around it.

Every one of those kits lists every item you need to actually go, with a per item weight and price, a running total down both columns, a section on what you can skip, and an upgrade ladder priced in grams saved per dollar. Each also loads straight into the gear list builder so you can swap this item for something you already own and watch the total move. That is usually a faster way to decide whether a purchase is worth it than reading another review of it.

Who should skip it?

Anyone who already knows they will keep doing this. Beginner tier gear works correctly and costs a fraction of the alternatives, and that is exactly the right trade for a first season. It is the wrong trade if you already know your base weight target and this item is the thing standing between you and it.

Going lighter must not mean going unprepared. Shelter adequate to the actual conditions, insulation, rain protection, water treatment and a way to call for help are fixed costs on any list. If a lighter version of this item means cutting into one of those, it is the wrong purchase however good the spec sheet looks. You are responsible for what you walk into, and the forecast is not the conditions.

Related reading

• Our full headlamps and electronics roundup, split into beginner, intermediate and expert tiers
• Base weight tiers chart
• Ultralight packing checklist
• Gear list builder: see what this item does to your own base weight
• Base weight calculator
• Six complete example gear lists, every item priced and linked
• All verified gear specs, A to Z