The expanded 1 ft x 4 ft RetroFit family takes modular assembly to another level. All our 1 ft x 4 ft Retrofits now feature a modular connector that enables our Retrofits to be daisy chained in longer lengths than ever before. 36 of our 16 W single tube products can be linked together and illuminated from one power source. Similarly 18 of our upgraded 32 W or 12 of our new 45 W products can be linked and powered from one source. They can be connected with either our dual connector or our 8 ft or 4 ft cables, giving you extreme layout flexibility. All the 1 ft x 4 ft products feature our powerful earth magnets to facilitate positioning while fixturing the products. Make the simple upgrade and get 7 years of stable quality warrantied lighting from a shatter-proof RetroFit using as little as half the energy of your equivalent fluorescents.