Perfect.  Nice bright white light, thanks to the LED lamp.  Fresh batteries do indeed last about 30 hours.  You can turn them on/off.  I stocked up on the CR2032 batteries since I place them in decorative votive holders and ise them as night lights in some rooms.  You've definitely spoiled me, as I'll only be seeking LED votives, tealights or luminaires:  the light is clean and crisp.