@Diogenese_Shiplap 'Long lasting light bulbs' are simply lower watt incandescent light bulbs designed to be used where changing bulbs is inconvenient, like inside your oven. Incandescents burn out because when on the tungsten filament gets hot enough to sublimate and condense on the sides of the bulb. Eventually enough tungsten sublimates to break the filament and the bulb no longer functions. The lumen to power curve gets better the hotter the bulbs run, but lifespan decreases accordingly.