The red taillight on the Marbel 2.0 is capable of producing over 90 Lumens. There are a total of 4 red CREE LEDs protected inside the tail bash guard. Each LED is rated at over 23 lumens, so if all 4 LEDs are illuminated fully, the max taillight brightness = 4 LEDs x 23 lumens each.
*Lumens are a unit of flux (light/area) and describes the total amount of light that is radiated.