Jim Buoy is now providing the all-new No. 9000-X Series Light. The all-new Model No. 9000-X flashes 30 times per minute and lasts up to one year without a battery change. The Model No. 9000-XSB maintains a steady burn for up to 1-1/2 months of continuous battery use. Both models electronically shutoff during daylight hours and automatically turn on at darkness and are powered by 3 Alkaline "D" cell batteries (not included). They feature the heavy-duty construction Model No. 9000 Light (see above) utilizing an almost indestructible polycarbonate lens and are completely watertight and submersible.