This challenging bulb can challenge your CFL and incandescence bulbs in terms of energy efficiency and luminescence.The World’s Most Energy Efficient Light Bulb. Using only 10 watts of electricity, the Nanoleaf bulb generates over 1200 lumens, equivalent to a 75W incandescent lightbulb. There are plenty of 20-60W Equivalent LED light bulbs in the market today, but the selection for 75-100W equivalents is still quite rare. To most light bulb manufacturers high efficiency and cost effective light bulb production is still uncharted territory. The Nanoleaf takes energy efficient lighting to a whole new level by offering a lightbulb far more efficient than any existing LED bulb. It is a true breakthrough for LED Lighting technology.