Duo-Pack of Eco-LED Plug-&-Play dimmable Eco-LED 18" tubes in Cold White, T8 for 12V DC installation. (LT8-CWM2) 66 SMD 5050 LEDs in COLD WHITE (6000K-6500K) LED replacement for 12V DC fluorescent tubes model F15T8. Input voltage 10-14V DC, total watts of 9 W. Use them with or without ballast! Output lumen of 648-720 LM with ballast (810-900 LM without ballast) & consumption of 0.738 A with ballast (0.560 A without ballast). Packages comes with the bypass cable. Dimmable! Compatible with our popular Wireless Wall Switch (WS-01 or WS-01DC), which procures flicker-free 7-step dimming in 12V lighting systems.