It is really cool that this bulb has managed to last as long as it has. It has been turned off (and has moved locations a few times), but that doesn't take anything away from it's achievement. However, there is really nothing miraculous about this bulb, and it certainly does not prove that "they don't make 'em like they used to". It's simply a thick filament that is incandescent at a really low temperature. Carbon filament lamps of that era output about 3.5 lumens per watt and lasted about 1,000 hours. This particular lamp has lasted about 950 times as long, so it's efficacy is much, much lower. It's effectively a 4 watt heater that's lasted a century that gives off a slight glow as a side effect.