The Rigid guys make good off-road lights, and I have met the owner, and he is a decent guy and an ex-airline pilot.
The lumen value he is giving for that particular light is raw lumens from the LEDs as specifed by the LED manufacturer. The problem with raw lumens numbers from the LED manufacturers is that they come from turning the LED on briefly when the die temperature is at 25C. Once you put the LEDs into a real world system, you lose lumens due to temperature effects, current density effects, and lens losses. In practice, the lumens that wind up in the focused beam are typically 60% or so of the raw lumens. All of the lumen values we are using in our datasheets are measured beam lumens (what is actually going out the front of the light in the desired direction). We don't use raw lumens in our datasheets because they are meaningless lab values that don't represent what the user is actually getting.
So I would just caution consumers to carefully look at the specifications as the numbers are often not apples-to-apples comparisons.
The raw lumen value for the Aerosun is 2880 lumens while the beam lumens are typically around 1700.
Best Regards,
Dean Wilkinson
CTO, AeroLEDs LLC
Quote:
Originally Posted by ppilotmike
Dean,
No bashing, but what's your take on the Rigid Industries R-Line of LEDs? they claim high lumens and fairly good throw by the looks of their little graphs...
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