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Insanely Bright Light
on February 22, 2014
This light is extremely bright! Using my Nikon D600 camera with 6 NiMH AA's installed in the light with no diffuser, in a dark room, an exposure of a white wall from 1 meter is:
ISO 100, f/2.8, 1/160 with center being brightest and severe falloff at the edges of a 24mm frame. This equates to around 2600 Lux @ 1 meter.
I used an Extech multimeter to measure at the battery terminals:
On 6 AA's at 7.76 V (no load), at full light power, current consumption is 1.4 Ah; at half brightness (one stop darker) 560 mAh; and at minimum power (5.67 stops less than full) 26 mAh (the light turns off after this level).
It's impossible to look at the light at full power and for video work, I can't imagine ever using it for fill, but it certainly can light up a large room if you need to. You could save money and buy the CN-160 if you need it just for fill light.
In a real world example, at full power with diffuser, in an 8x12 room facing the long way @24mm, the D600 metered ISO 200, f/2.8, 1/30. You would have to shoot at least at 50mm to minimize vignetting though.
If you would use this at full power, you would need a change of batteries every hour. However for typical video fill light use, it might last 4-10 hours depending on brightness.
White balance according to Lightroom custom WB picker with a D600 RAW file on a calibrated neutral target is:
Orange Diffuser: 3350K, -4
White Diffuser: 5100K, +11
Pink Diffuser: 4950K, -12