BLUES BUSTER FULL SPECTRUM 75-WATT LIGHT BULB HELPS YOU BEAT THE MELANCHOLY THAT OFTEN ACCOMPANIES GREY, CLOUDY DAYS AND DARK NIGHTS DUE TO A LACK OF SUNSHINE IN YOUR HOME. OUR EXTRAORDINARY FROSTED BULBS FILTER OUT BROWN COLORS AND RECREATE A FULL SPECTRUM OF INCANDESCENT LIGHT THAT DOESN'T CONTRIBUTE TO EYE STRAIN AS UNNATURAL LIGHT DOES. FOR INDOOR USE ONLY, THIS ONE-COUNT BULB LASTS UP TO SIX TIMES LONGER THAN ITS CONTEMPORARIES. IT'S IDEAL FOR USE IN LOCATIONS WHERE TRUE COLOR DEFINITION IS IMPORTANT SUCH AS ART STUDIOS, HAIR SALONS AND DENTAL OFFICES. OUR BULBS HAVE HEARTY FILAMENTS AND MOUNTS SO THEY CAN WITHSTAND ROUGH HANDLING. WITH A BRIGHTNESS OUTPUT OF 750 LUMENS PER BULB, YOU MAY EXPERIENCE A YEARLY ESTIMATED ENERGY COST OF APPROXIMATELY $9.03 DEPENDING UPON USAGE.