Nightstick TCM-550XL
The Nightstick TCM-550XL is a pistol-mounted LED weapon light rated at 550 lumens and 4,612 candela. That candela figure works out to an effective positive identification distance of 23 yards and visual impairment out to 3 yards, both calculated from the published beam data. It runs on CR123A and is not rechargeable. It weighs 2.5 oz in an aluminum body 2.5 inches long. Measured against the 148 weapon lights in the index, it lands in the dimmest quarter for output (550 lumens), among the least intense 10 percent for beam intensity (4,612 candela), in the lightest quarter for weight (2.5 oz), and among the least expensive 10 percent for price ($90). It is one of 54 entries in the index that qualify as a light in the same 500 to 999 lumen class. The closest listed comparison is Nightstick TCM-5B, the same brand's light in the same 500 to 999 lumen class, priced at $95.
| Series | TCM-550XL |
| Light Color | White |
| Emitter Type | LED |
| Lumens | 550 |
| Candela | 4612 |
| Laser | No |
| Effective PID Distance (yds) | 23 |
| Max Effective PID Distance (yds) | 20 to 40 |
| Effective Visual Impairment (yds) | 3 |
| Max Effective Visual Impairment (yds) | Under 5 |
| Form Factor | Pistol |
| Battery | CR123A |
| Rechargeable | No |
| Material | Aluminum |
| Weight (oz) | 2.5 |
| Length (in) | 2.5 |
| Average Price | $90 |
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