Bulb 75W 120V E-11 Sehal These Eco-PAR halogen bulbs have medium screw bases making them compatible for use with standard household or commercial fixtures—everything from recessed directional lighting to. To help you find the right bulb for the right application see Westinghouse’s full offering of Eco-PAR reflector halogen bulbs available in a variety of lamp sizes and wattages.Eco-PAR Reflector Halogen light bulbs are an excellent energy-saving alternative to popular compact fluorescent light bulbs and expensive LED light bulbs.