Measurements taken with the Texas Ace Lumen Tube calibrated with Maukka lights and Sekonic C-800-U. Output measured at 2s from turn on.
| Klarus ST15R | Highest | 1,045 lumens | 6812K | 0.0015 DUV | 70.6 CRI | -22.3 R9 | 41.3 R12 | 66 Rf | 95 Rg | VTC5D | |
| Klarus ST15R | Highest | 854 lumens | included battery | ||||||||
| Klarus ST15R | Highest | 1,000 lumens | Keeppower Protected Sony VTC6 | ||||||||
| Klarus ST15R | Highest | 864 lumens | Sanyo NCR18650GA |
