Height: 4-1/4-Inch, Width: 2-3/8-Inch * Ceramic socket uses one 12V, 20-75W MR16 bi-pin lamp * Must be purchased with transformer T537 or T538 12V solid state electronic transformer for installation on Juno Track * Square steel wire form curves and angles to encircle lamp and hold housing with two locking screws * 90-degree vertical aiming capability and 358 degree rotation