The McKinley Series utilizes the PAR20, 50 watt halogen lamp; no need for a low voltage transformer. The use of the McKinley Series with the 120V PAR20 halogen lamp makes an economical system for outdoor lighting and yet when specified with one or more of the many optical accessories available, it can provide very dramatic lighting effects. Like all B-K Lighting fixtures, the McKinley is machined from solid aluminum and is finished in one of eight polyester powder coat finishes. The exclusive B-K Lighting Posilock Knuckle is utilized to ensure its aiming integrity.