They may look like a regular light bulb, but boy do they pack a (blinding) punch. Cree LED Light Bulbs, compatible with just about all fixtures, are so eco-friendly that it uses only around a sixth of the power of their counterparts and last an incredible 25 times longer, saving not just the planet, but your wallet too. Mercury-free, dimmable and forged from safety glass, they're available in 60 of 40W models. Thomas Edison would be proud.