Solar powered outdoor security light fixture. Requires no electrical wiring - can be mounted on walls, under eaves, or on a deck, fence, or shed. Back-up alkaline batteries (not included) run lights at a lower lumen output when rechargeable batteries get low. Works with (4) D alkaline batteries in battery mode. Back-up batteries provide additional battery life. Time Xtender keeps lights on at 100% for 1 minute, and drops to 20% without motion for 4 minutes so you aren't left in the dark. Large optional diffusers illuminate and reduce glare. 180-degree sensor detects motion up to 33-feet, and directly beneath the sensor. Circuit protection built into unit, so it shuts product down if batteries start to overheat.