Does the life of a lightbulb depends on its wattage?

Answer 1

It depends on its temperature (and higher wattage ones could get hotter), on its enclosure (more closed = higher temperature), on its position (base up is worse than base down), and on its brand (poor construction, flimsy filament, poor / no burn-in at factory)

Answer 2

Lightbulbs are the perfect example of products designed with built-in obsolesence. It has long been possible to produce lightbulbs which last for years without any problems at virtually the same cost as the lightbulbs we buy today - however producing those lightbulbs would quickly result in no-one selling any more lightbulbs because they don't need the bloody things.

Answer 3

higher power bulb burns out its filament earlier. if you take the same bulb and pumped a higher power through it, it will die faster.

to make a higher power bulb, the filament is thickened whch reduces resistance to increase current. now the bulb puts out more light--and heat, which accelerates vaporisation of the filament. so the filament gets thinner, increasing resistance and heat, and the process repeats until the filament is completely gone. in other words, with the same design, the higher power bulb will go earlier.

say you put a certain amount of effort to create a 50W bulb and a same amount of effort to make a 200W bulb. the higher power one will have a much shorter lifespan. there is a tradeoff for the manufacturer if he wants to make all his bulbs have the same lifespan. it is possible but not exactly what we see in practical life.

an example is a 100W halogen bulb that can last significantly longer than a 50W incandescent. the secret is in the differences of technologies, and of course, cost. remember that these are 2 different kinds of bulbs with differnt efforts put into their manufacture.

bottom line, same type of bulb, higher wattage means lower lifespan,

Answer 4

The wattage of a bulb does not affect its life-span. To make a higher wattage bulb, you have to make it lower resistance, which will cause it to draw more current, and so, yes, it will run hotter. But it was designed that way, and so should have the same nominal life-span asthe lower wattage bulb was designed to have.

Answer 5

lifespan depends purely on the build quality. a cheap 60 watt bulb will last much less time than a high quality stadium floodlight, or other such quality light fitting