With a luxmeter I measured the light output of Enlightened Otter at a color temperature 3500 K and 6500 K, the resulting brightnesses are 1600 lx and 2000 lx. I'm quite happy with that, for comparison, recommended minimum brightness desk lighting is 800 lx.
I used the values to create the following specification table:
|Iout (per channel)||0-500mA|
|Vout (per channel)||0-18.5V|
|Pout (per channel)||0-7.5W|
|Illuminance (3500k @400mA)||1600lx|
|Illuminance (6500k @400mA)||2000lx|
|Iin (USB)||3A (max)|