This is a *REPLACEMENT* Bulb w/50' cord only, for Underwater Fish and Dock Light Kits. Fits many brands of 250 watt HID underwater lamp systems. If you unsure if this lamp will fit your current system, please contact us, email or call us prior to ordering to find out if this bulb will work in your underwater light kit. This bulb must be connected to a correct size transformer, it can not be directly plugged into 110 volt outlet. Warranty does not cover incorrect application. Please ask compatibility questions prior to ordering. We ship our orders the same or next business day. Additional Details ------------------------------ Product description: This is a *REPLACEMENT* Bulb w/50' cord only, for Underwater Fish and Dock Light Kits. Fits many brands of 250 watt HID underwater lamp systems. If you unsure if this lamp will fit your current system, please contact us, email or call us prior to ordering to find out if this bulb will work in your underwater light kit. This bulb must be connected to a correct size transformer, it can not be directly plugged into 110 volt outlet. Warranty does not cover incorrect application. Please ask compatibility questions prior to ordering. We ship our orders the same or next business day.