Klarus XT11GT Pro V3 vs Klarus XT21C size comparison

XT11GT Pro V3 vs XT21C: how they differ

Size and weight

The Klarus XT11GT Pro V3 is the shorter light: 142 mm (5.59 in) against 147 mm (5.79 in), a difference of 5 mm (3%). At their widest points they are about the same (35 vs 35 mm). Weights are published on different bases (Klarus XT11GT Pro V3: 121 g listed; Klarus XT21C: 110 g listed), so they are not directly comparable.

Brightness and throw

The Klarus XT11GT Pro V3 is rated brighter: 3,300 lm maximum vs 3,000 lm for the Klarus XT21C, 10% more. For beam distance the Klarus XT11GT Pro V3 reaches further: 380 m vs 324 m rated throw (17% more).

Battery

The Klarus XT11GT Pro V3 runs on a removable 18650 battery; the Klarus XT21C runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).

Price

When we checked on Nov 4, 2026, the Klarus XT11GT Pro V3 was $89.95 at batteryjunction.com and the Klarus XT21C $104.95 at batteryjunction.com, so the Klarus XT11GT Pro V3 cost $15.00 less. Prices change often, so check the current price before you buy.

Type

Both are tactical lights in our catalog with a tube body.

Which should you buy?

Choose the Klarus XT11GT Pro V3 if you want a shorter light (5 mm shorter) and longer throw (380 m vs 324 m). On the specs we track, the Klarus XT11GT Pro V3 is ahead or level everywhere; the Klarus XT21C makes sense mainly if its price, interface or a feature we don't track suits you better. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.

Check price ↗ Klarus XT11GT Pro V3 Check price ↗ Klarus XT21C

We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure