I purchased one for a friend who is a pilot, since the red light does not effect his night vision; he now keeps an extra one on hand, just in case.
Other uses:
The red light emitted from the LED, can not be seen by deer, which makes useful for hunters in their stands while waiting for light or as backup for a flashlight.

Auto, boat, camping / hiking emergency or survival kit. The LED can be seen for some distance in the dark if looking directly at the source. If you point the light downward, the illumination is not noticeable.

The only con is that the red light does not give much contrast. I have a green light that provides more contrast, but it's hard on the eyes.


Performs much better than other keychain lights   November 4, 2005
B. Houston (Atlanta)
24 out of 25 found this review helpful

You can find keychain flashlights on eBay for $1, but they are ridiculously inferior to this light. I've had mine for a month, and already used it several dozen times. I didn't know how handy these were! These Micro-Light II's use the newer Nichia LED's, which are twice as bright as normal LED's, but use the same amount of power (so these easily outshine most other keychain lights)... It isn't as bright as a hand-held flashlight, but you can easily use this for walking at night if you don't have access to a larger flashlight. The on/off switch also works great and does not accidentally turn on while in my pocket. I really have nothing to complain about this product, except that the price may seem high. In this case though you do get what you pay for. The batteries are two 2016 Li-Ion watch-sized batteries and are easily available at your local mega store or mall.

Beware that these are not very water resistant! I don't think water will permanently damage them, but you may not be able to get a light out of it while it is wet since seems to be no waterproofing on the case.


Years of dedicated service from this little keychain light   January 8, 2007
Jody (Olean, NY)
10 out of 11 found this review helpful

I bought one of these at an Eastern Mountain Sports a few years ago. I thought the price was a little high at fist, but that went away after I got to use it.

It is very bright, I had the original battery in mine still after 3 1/2 years, but it was getting low. Replacement batteries are only about $3 for a good one.

I have purchased some of the generic keychain lights for other people as gifts, and none of them were nearly as bright as this one.

I lost a set of keys with the Photon II attached so I need to replace it, I wouldn't be hunting down the exact model again if I was not happy with the last one :)


Can't live without it.   December 15, 2005
S. Krause
6 out of 6 found this review helpful

This is a tough little light. I've used mine for years without any problems. I take it everywhere on my keychain and don't even notice it's in my pocket. Very, very usefull!