5ft Lock & Seal Lamp Cord Extension Hydrofarm offers a full range of power supply cords as well as adapters to switch from Hydrofarm ballasts to other brands of reflectors, or from Hydrofarm reflectors to other brands of ballasts. We also offer extension cords for your convenience, but keep in mind that some high intensity light systems may not work at long lamp cord lengths due to ignitor range restrictions. If you have any questions, please consult your sales representative.