Hmm... you sense no danger.
Snap-hiss. Your lightsaber ignites and casts a pale blue pool of light around you... but for all its intensity, lightsabers never seem to be very bright or useful as a flashlight.
Holding your lightsaber in one hand, you can have your glowrod in your other hand. You turn it on...
AHHHHHH! Some giant beast is lunging at you! Oh, wait, no, just an exhibit.