Adjustable locking base features 360 degrees of rotation and 180 degrees of tilt. The spring loaded pem bolt enables of the user to easily change and lock the angle of rotation or tilt into one of the index holes. No amount of vibration will change the setting until the operator pulls back the spring loaded pin and selects a new position and locks that position in by releasing the spring loaded pin into one of the index holes. A 3/8 inch hole enables mounting of any post mounted light. A 5-inch diameter, 200lb grip magnetic base enables the base to secure a light on vehicles and equipment under severe vibratory conditions.