With some regret, the unicorn reduced the intensity on her glowing orb of light from 'eye-scalding reasonable replacement for the sun' to 'well-fuelled lantern with crystal-clear lenses.' It was a noticeable drop, but once she tapped her helmet's controls to retract the darkening lenses, Lily could still make everything out clearly. But she kept her mind ready to bring the beam all the way back up to power level eleven if there was a hint of treachery ahoof. The spiral passageway ceased its descent, and Lily knew the stala-whatever cavern must be just ahead.