Leviton GX24q-4 Base, 42W 4-Pin, 10mm Compact Fluorescent Lampholder, Vertical, Bottom Screw-Down, Yellow Color Code, Quick-Connect 18AWG, 26725-414, White;

Leviton's line of "Smart" CFL Lampholders are color-coded for easy wattage identification. Snap-in versions are designed for 16 Ga. panels. They feature metal-spring lamp-retainer clips that provide positive lamp retention and are more durable than plastic clips. There are two wiring ports per contact to speed up harness wiring. Four screw holes for greater mounting flexibility and wire routing options for top or bottom side of mounting panel for easier assembly. They feature a durable white thermoplastic body.