Twiggy S1 features a square 1" lambertian white diffuser lens that provides uniform light without hotspots. At 7 watts per foot, the 12 Volt AC fixture contains very warm white, 92+CRI LEDs for excellent color rendering. The Twiggy S1 is available in 12 inch increments up to 72 inches. May be ordered in 3, 6 or 9 inch increments (see page 3 of spec sheet for exact dimensions/ overall length with end caps). Fixture uses a 12 VAC Class 2 electronic low voltage LED transformer (included). Transformer fits inside a standard square 4" electrical box with round plaster ring and floating split canopy (4SQ) or the Slim Profile Junction Box (1RE) that does not require a canopy. Twiggy is dimmable with an electronic low voltage dimmer. Fixtures include a 5 year warranty.