|
OK, I pulled out an old luxmeter from the old (and I mean 90's) camera bag. It is a Calcu Light-X, for those in the know. It has a sensor on the top, and you can select either the direct-feed lens, or the translucent bubble, to gather your reading. I chose the bubble for this reading.
With 6 volts, the reading came back as 33 (I'm assuming lux, being a luxmeter). Pulling out one battery, and therefore giving only 3 volts to the 3 LEDs, the luxmeter came back with a reading of 24.
While the LEDs are still bright to look straight at (duh!), the effect of removing one of the batteries makes things a lot easier on the dark-adapted eye.
Reading is still easy, but significantly easier than the red LED setup.
I could probably remove one of these LEDs, and get an even better experience out of it. Three is probably unnecessary, as they produce much more visible light than the red. Covering it, it brings a reading of about 21, but visually it is significantly less light output in a dark space.
|