Black Diamond Spot 400 Review: The Headlamp That Quietly Does Everything
The Spot 400 is the headlamp most campers should probably own. It is bright enough for night hiking, sealed well enough to survive a downpour, and cheap enough that you will not baby it. If you only own one headlamp, this is a defensible answer.
What we liked
- 400 lumens lights up a whole campsite without blinding your tentmate
- IPX8 rating survives being dropped in a stream, not just rain
- Red night-vision mode is genuinely usable for middle-of-the-night tent exits
- PowerTap dimming lets you drop brightness with one tap instead of cycling menus
- Runs on AAA batteries you can buy anywhere, with an optional rechargeable pack
- Lock mode stops it switching on inside your pack
What to watch
- Red light is buried behind a long-press sequence that you will fumble half-asleep
- Battery door hinge feels like the weakest part of an otherwise tough build
- AAA cells are wasteful if you use it every weekend
In depth
Lumens, beam shape and what you actually need
Lumens are a headline number, and past a point they stop being the thing that matters. A 400 lumen lamp on full power drains batteries quickly and blinds everyone in camp. What makes a headlamp useful is the beam pattern: a spot for looking down a trail, and a flood for cooking, reading and sorting gear inside a tent.
Running the lamp on its mid setting for most tasks is the normal way to use one of these. Reserve full power for route-finding on an unmarked trail or for signalling, and use the dimmed flood for camp chores. A headlamp that can drop to a genuinely low setting lasts far longer than one that only goes bright and brighter.
Beam distance claims deserve scepticism. Light falls off with distance squared, so a beam described as reaching 100 metres lights that distance dimly at best. Realistic useful range at full power is a fraction of the figure on the box.
AAA batteries versus a rechargeable pack
AAA batteries are the reason many people still choose this class of headlamp. You can buy them at a petrol station, borrow them from a remote control, and carry a spare set for almost nothing. That matters on a multi-day trip or in an emergency kit that might sit unused for a year.
The downsides are cost and waste if you use the lamp often, and cold-weather performance. Alkaline cells fade badly below freezing, while lithium AAAs keep working at much lower temperatures. If you night hike in winter, lithium cells are worth the extra cost.
The compromise most owners settle on is a rechargeable pack for normal use plus a set of AAAs in the pack as a backup. Because the lamp accepts both, you are never stranded by a flat battery, which is the argument for this design over a sealed rechargeable lamp.
Waterproofing and how tough it really is
An IPX8 rating means the lamp survives being submerged, not merely rained on. In practice that covers the two situations that kill headlamps: a sudden downpour on an exposed ridge, and dropping it into a stream while filtering water. Rinse it with fresh water after saltwater or muddy exposure and let it dry before storing.
The most commonly reported weak point on lamps in this class is the battery door, particularly the hinge and the latch. Treating the door gently when changing batteries, and checking that the seal is clean and seated before closing, prevents most water damage and most breakages.
Cold makes plastic brittle, so a lamp that survives being dropped in July may crack in February. Storing it inside a pack rather than on the outside, and warming it in a pocket before use, is a simple way to avoid the problem.
Red light, night vision and camp etiquette
Red light preserves your night-adapted vision and is far less disruptive to the people around you. In a shared shelter, a dim red setting lets you find your bag, check the time and get out of the door without waking anyone or resetting your own eyes to darkness.
The trade-off is that red light shows far less detail than white light at the same brightness. It is good for orientation and poor for reading a map or finding a small item in a stuff sack. Most experienced campers use red inside the tent and white outdoors.
Wildlife is another consideration in some areas, where a bright white beam can disturb animals or attract insects. A low red setting is the polite and often more practical choice around camp in the evening.
Care, storage and emergency-kit habits
For an emergency kit, store the lamp with the batteries out, or use the electronic lock so it cannot switch on inside a bag. A headlamp that has been quietly draining itself in a rucksack for six months is the most common failure of emergency lighting, and the lock function exists precisely for this.
Clean the contacts with a dry cloth if the lamp flickers, and check the O-ring or seal each time you change batteries. Do not store the lamp with alkaline cells installed for long periods, since leaking cells corrode the contacts and can ruin the electronics.
The headband is worth washing occasionally. Salt and sunscreen degrade elastic, and a stretched band is why many headlamps end up uncomfortable long before the electronics fail. Replacement bands are cheap and turn an ageing lamp into a comfortable one again.
Choosing between this and other headlamp styles
For general camping, night walking and a household emergency drawer, a lamp in this class is the sensible default: bright enough for real use, sealed well enough to survive bad weather, and cheap enough to own two.
If your priority is weight, a rechargeable ultralight lamp with a smaller battery will save you perhaps half the weight and is the usual choice for long-distance hiking, at the cost of battery flexibility. If your priority is maximum output for trail running or fast night hiking, a higher-output model with a bigger battery is the better tool, though it is heavier and more expensive.
Buying one versatile lamp plus a cheap backup rather than one expensive high-output lamp is the arrangement that covers the most situations for the least money, and it avoids a single point of failure on a trip.
Questions we get asked
How long do AAA batteries last in it?
Runtime depends heavily on the setting. On the lowest mode a set can last well over a hundred hours, while running full power continuously will flatten good alkalines in a few hours. For a weekend of camp use, one set usually suffices.
Can I use it in heavy rain?
Yes. The IPX8 rating means it is sealed against immersion, so rain is well within its limits. Check that the battery door seal is clean and properly seated, since that is the one place water gets in.
Is red light bright enough to walk with?
Generally no for rough ground. Red light is excellent for preserving night vision and moving around camp, but it shows much less detail, so most people switch to a low white setting for walking on uneven trails.
Do lithium batteries help in winter?
They do. Lithium AAA cells keep working at much lower temperatures than alkaline ones, which fade quickly below freezing. Keep the lamp in an inside pocket until you need it and the difference is even larger.