My Solar LED Rock Spotlight is not as bright at night as when I first bought it. How can I bring it back to full brightness?

Light output is decreased when solar light batteries are not adequately charged. Most likely your Solar LED Rock Spotlight is not absorbing enough sunlight during the day to properly charge its batteries. Try switching your Rock Light to the OFF position and putting it in a place that gets direct and consistent sunlight. Let it charge in this state for 2-3 days, and see if this solves the problem.