I own the power Worm Light, and I think that it works just great! The only drawback is that the Battery pack only lasts 8 hours max., and the time grows even shorter when you use light, so for extended play, only use it sparingly in dark situations...and since the light plugs into the battery pack instead of the unit, you can use just the battery pack and light for a booklight or something to that effect if you wish. A neat little bonus.