Fenix TK21R vs Fenix TK35R size comparison

TK21R vs TK35R: how they differ

Size and weight

The Fenix TK35R is the shorter light: 154 mm (6.06 in) against 159.5 mm (6.28 in), a difference of 5.5 mm (3%). At its widest point the Fenix TK21R is 7 mm slimmer (36 vs 43 mm). The Fenix TK21R is 121 g lighter (221.4 g vs 342 g, with battery).

Brightness and throw

The Fenix TK35R is rated brighter: 5,800 lm maximum vs 3,600 lm for the Fenix TK21R, 61% more. For beam distance the Fenix TK35R reaches further: 610 m vs 480 m rated throw (27% more).

Battery

The Fenix TK21R runs on its own battery (One included 6000mAh rechargeable li-ion); the Fenix TK35R runs on its own battery (Two included 4000mAh rechargeable li-ion).

Price

When we checked on Nov 4, 2026, the Fenix TK21R was $134.95 at fenixlighting.com and the Fenix TK35R $199.95 at fenixlighting.com, so the Fenix TK21R cost $65.00 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 Fenix TK21R if you want a slimmer profile (7 mm narrower) and less weight (121 g lighter). Choose the Fenix TK35R if you want a shorter light (5.5 mm shorter), more output (5,800 lm vs 3,600 lm) and longer throw (610 m vs 480 m). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.

Check price ↗ Fenix TK21R Check price ↗ Fenix TK35R

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