Josef Stefan's Light Bulbs

Origin
Josef Stefan (1835 - 1893) was an Austrian physicist, mathematician and poet who treated light as a working matter. More specifically the law describes that energy radiated per unit surface area of a black body across all wavelengths per unit time. There are several constants in his Stefan-Boltzmann law one of them being the weight of the light in terms of their mathematical formulas in order to figure out nearly impossible things like the Temperature of the Sun and of the stars. Stefan worked tirelessly in order to get the basics of law perfect. When it became too dark he'd turn on the light but worry about his health and well being went into the bulb and any time he used the light his eyelids grew heavy, his head wouldn't stay up and he would retire to bed.

Effects
Over time the strength of the weight that light from these bulbs got heavier and heavier. If turned on and stood in the light your entire body will feel heavy and you'd be pulled to the ground unable to move until another person turns off the light.