BULBRITE CFL T4 COIL MEDIUM SCREW (E26) 42W NON-DIMMABLE LIGHT BULB 5000K/SOFT DAYLIGHT 150W INCANDESCENT EQUIVALENT 4PK (509536)Bulbrite's Compact Fluorescent light bulbs are a great energy saving light source. High light output CFLs like this are great for larger spaces or commercial applications. Lasts up to 8 times longer than standard Incandescent light sources (10,000 hours). INCLUDED IN THE BOX: (4) 42 WATT NON DIMMABLE ENERGY WISER COILS (T4 COIL) 5000K APPLICATIONS: CEILING FIXTURE, OUTDOOR RESIDENTIAL, PENDANT DOWNLIGHTS, PORTABLE, WALL MOUNT SCONCE WHY THIS CFL T4