Best flashlight throwers

A thrower is a light built to put as much of its output as possible into a very small angle. That is an optical problem, not a power problem, and it is why a 1,650-lumen light on this page reaches nearly four times as far as a 2,800-lumen light on the tactical hub.

How we picked

Published beam distance, converted to candela, ranked. Where a maker publishes candela directly we use it. Every figure is sourced and we have handled none of these lights — see our methodology.

The ranking, and the arithmetic behind it

Why reflector geometry decides everything

Peak beam intensity scales roughly with the square of the reflector diameter and with how deep the reflector is, and inversely with the size of the emitting surface. That is the whole design problem of a thrower: a big deep reflector and the smallest, brightest possible die.

• Reflector diameter. Doubling it roughly quadruples peak intensity for the same emitter. This is why throwers have fat heads.
• Reflector depth. A deeper reflector captures more of the emitted light into the collimated beam and less into spill.
• Emitter size. A physically smaller die is closer to a point source and collimates better. The high-intensity emitters used in throwers are deliberately small, which is also why they produce fewer total lumens.
• Surface finish. A smooth reflector maximizes the hotspot; an orange-peel finish smooths the beam at the cost of intensity.

This is also why a thrower cannot be pocket-sized. The head diameter is the specification, and there is no way to shrink it without losing exactly what you bought the light for.

What you give up

Spill. A light putting 256 candela into the hotspot per lumen of output is putting almost nothing anywhere else, and the practical result is a bright circle in a black field. Walking with a thrower is genuinely unpleasant; you see a distant patch clearly and nothing at your feet.

The honest way to own a thrower is as a second light. EDC flashlights covers the first one.

Current draw, and why the cell matters

A high-intensity emitter driven hard pulls serious current. Acebeam ships the L19 with a 20-amp-rated 21700 for that reason, and a standard protected cell in its place will trip its own protection circuit or sag enough to lose a chunk of the intensity you paid for.

This is the most common way a thrower disappoints its owner: the wrong cell. 18650 versus 21700 covers current ratings.

How far can you actually see

The rated beam distance is where illuminance falls to 0.25 lux, roughly full moonlight. You can detect a large object at that range on a clear night. To identify what it is, you need somewhere around three to four times the light, which puts the practical identification range at about half the rated figure.

So a 1,300-meter light gives you real identification at somewhere around 600 meters, and only in clear air. Humidity, dust and fog cut it dramatically, because a tight beam scatters off airborne particles and you end up illuminating the air.

What we would not buy

A thrower advertising a very long beam distance with a small head. The physics does not allow it: reach comes from reflector diameter and depth, and a 25-millimeter head cannot produce a 1,000-meter beam whatever the listing says.

We would also avoid a thrower as a first or only flashlight. It is the most specialized tool in this category and it is bad at almost everything a flashlight is normally asked to do.