Best Answer

Light bulb filaments glow rather than burn because of the lack of oxygen within the vacuum of the bulb. Over time, the heating and contracting of the filament and the glass surrounding it creates a leak in the base of the bulb causing the vacuum to be lost and allowing oxygen to enter the bulb. It is during the contracting phase, which happens as the bulb cools after being turned off, that eventually the seal is lost. When this happens, oxygen is allowed to enter and the next time the bulb is turned on, the filament, now exposed to the oxygen, burns out.

User Avatar

Wiki User

โˆ™ 2006-04-06 15:26:25
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why do most lights burn out when they are first switched on?
Write your answer...
Related questions

Where is the fuse for dash lights?

depends on the car, most common problem for loss of dash lights are from having the switched turned down too low or off.

When are the Christmas lights switched on in New York?

most of them are turned on in November but someChristmas lights are turned on in the begging of December. Some people can't even turn their lights on because of all the snow. The range is about November.

Why dim cabin lights in plane when taking off?

The most dangerous time is during take-off and landing. They dim the cabin lights in order to make it easier for passengers to find the emergency exits as exits lights are never dimmed or switched off.

What degree of burn is the most pain?

first degree

Why did they switch from R-12 to R134a?

Around 1993 most manufactures switched.Around 1993 most manufactures switched.

What can make 95 Nissan altima brake lights go on and off?

The most obvious suggestion to this is that pressing and releasing the brake pedal while the ignition is switched on

What burn do you get from a hot car seat in the summer?

You most likely would only get a mild burn. But car interiors do not cause a first degree burn which is like a mild sun burn.

Why don't meteors burn up when they first enter earth atmosphere?

Most do burn up entirely but the very largest ones do not completely burn up.

What does the no smoking sign on an airplane mean?

Not very long ago smoking was allowed during the flight. It was however not allowed during landing, take off and during refuelling. A no smoking sign was therefore switched on and smoking was only allowed when the captain switched off the sign. Presently, no smoking is allowed in most flights, but the lights are switched on to remind the passengers that smoking is not permitted

How does using lights less help stop air pollution?

Using lights less uses less electricity. Most of the electricity that powers lights comes from power plants that burn fossil fuels. The burning of fossil fuels is the largest contributor to air pollution.

Did mr bean get in a car accident?

He wrecks his first car in the first episode of the television series, which is why he switched to the citron green Mini that most people identify him with.

How to fix Dash lights Saturn SC2 98?

One of the most common problems with dash lights is the dimmer switch. check that first.

Why do inside lights flicker on 2003 ford windstar?

It's common on most Ford's for the light switch to burn out on most models. The newer vehicles have been fixed but that's where you could start.

Are lights in the sky planes or what?

If the lights are moving, it is most likely they are planes. If the lights are not moving, it is most likely they are stars.

Which is a worse form of burn first degree or third degree?

Third degree is the most severe.

What is the second most powerful fire type move?

Its eruption as the first powerful is blast burn.

Heart rate to burn the most caleries?

Heart rate to burn the most fat

Are icecicle lights still the most popular?

Icecicle lights are no longer the most popular. Colored lights on trees are commonplace. Some icicle lights can still be found, but for the most part they are out of fashion. Lit wreaths are also popular.

My 2002 Chevy silverado duramax reverse lights won't turn on when I shift into reverse?

Try to replace the lights first. If they still don't work check the fuse. If that is good, it is most likely your back up light switch which is on the transmission(this is most likely your problem since both lights are out).

Why the tail lights and dash lights dont work on a 1992 infiniti q45?

most likely a blown fuse, replace, if it blows again you have a short, if you have a trailer connection look there first

What is the most effective first aid treatment for a burn?

To treat a burn, the most effective way is to run the area under running cold water for a minimum of 10 minutes, this will help to cool the area and reduce swelling, and in that promote healing.

Why most socket outlet have switches on them?

Switched sockets are safer. Also, in a switched socket, the plug can be left in and not have to be pulled out to cut off power to an electrical device.

Do people still play Battlefield 4 on PS3 or have they switched to the PS4?

Most people are still playing Battlefield 4 on the PS3, but some have switched to the PS4.

What bothers you the most driping water or flickering lights?

flickering lights

Can you have led lights on your motorcycle in MN?

Most likely, yes. Most states could care less about if you have LED lights or not, because LED lights are safer. Many motorcycles are sold with LED lights on them already.