I keep a little white Photon microlight handy for looking at
sectionals when needed, but it does mess up my vision because it is so
bright.

The Photon III has low/medium/high settings as well as some useless flash modes.
The mode is kind of a pain to change, but once set it stays on that mode. Try
one of these set at medium or low intensity. Also, with the "covert" snout your
eyes are shielded from directly viewing any of the emitted light.