VERILUX 100 WATT LIGHT BULB. FROSTED ENVELOPE FULL SPECTRUM INCANDESCENT.Verilux boosts truer natural colors. The lower photo shows the box side that depicts two pictures. The top pictures shows a more natural light than the bottom. Neodymium, a rare earth element, absorbs a significant portion of the yellow spectrum that is emmitted from the burning of a wire filament in incandescent light bulbs. Good lamps! Give them a try.