X400
SureFire X400 Ultra
The SureFire X400 Ultra is a pistol-mounted LED weapon light rated at 1,000 lumens and 11,300 candela. That candela figure works out to an effective positive identification distance of 36 yards and visual impairment out to 5 yards, both calculated from the published beam data. It carries an integrated red aiming laser. It runs on CR123A and is not rechargeable. It weighs 4.9 oz in an aluminum body 3.6 inches long. Measured against the 148 weapon lights in the index, it lands about in the middle for output (1,000 lumens), on the less intense side for beam intensity (11,300 candela), on the heavier side for weight (4.9 oz), and among the most expensive 10 percent for price ($649). It is one of 70 entries in the index that qualify as a light in the same 1,000 to 1,999 lumen class. The closest listed comparison is SureFire X400 Ultra MasterFire, the same brand's light in the same 1,000 to 1,999 lumen class, priced at $669.
| Series | X400 |
| Light Color | White |
| Emitter Type | LED |
| Lumens | 1000 |
| Candela | 11300 |
| Laser | Red |
| Effective PID Distance (yds) | 36 |
| Max Effective PID Distance (yds) | 20 to 40 |
| Effective Visual Impairment (yds) | 5 |
| Max Effective Visual Impairment (yds) | 5 to 10 |
| Form Factor | Pistol |
| Battery | CR123A |
| Rechargeable | No |
| Material | Aluminum |
| Weight (oz) | 4.9 |
| Bezel Diameter (in) | 1.125 |
| Length (in) | 3.6 |
| Country of Manufacture | USA |
| Average Price | $649 |
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