While more and more lighting designs are using LED lights to save electricity, researchers at MIT have discovered how to make energy-efficient light bulbs out of traditional incandescent bulbs.
Typical incandescent bulbs function by heating up an inner filament to over 5,000 degrees Fahrenheit, producing unnecessary and wasted heat energy, in addition to the desired light. Therefore, LED lights began replacing such bulbs, with the catch that the light they produce appears less natural.
However, MIT's reinvented energy-efficient light bulbs are made with photonic crystals that reflect the wasted heat back at the filament, reusing the heat energy to continue lighting the bulb -- all with less electricity. The final product is an incandescent bulb that has tripled in efficiency from its previous version, with the potential of increasing efficiency by another 40%.