Product details:

These strobe lights have 4 high-intensity LEDs that flash in low light conditions. The built-in solar panel on top charges the NiMH battery even on cloudy days. Light does not operate during the daytime, while it is charging. Light includes photocell and will only run at night. On a full charge, the LEDs will flash continuously for 5 full nights, even without the sun to recharge. The strobe lights can be mounted with the optional base, or inserted into cones with a 1 5/16" or larger top hole. It will not fit into all traffic cones, so check your cone's top hole diameter. Features: Light: 6 1/4"H x 3 3/4" diameter Auto on and off Battery life up to 2 years 60 flashes per minute 4 high-intensity 1.2 candela LEDs LED life 100,000 hours maximum 1" reflective strip for added visibility