1. High Voltage in the Home – If the supply voltage to your home is too great, bulbs will generally burn brighter and burn out much faster. To find out, use a volt meter and check the voltage in an outlet or at the service panel. Usually, you’ll like to see a voltage of 115 – 125 volts. Anything more is considered excessive and the utility company should be called to correct the problem.
3. Bulb Doesn’t Light –
If a bulb doesn’t light even after you’ve changed the bulb, it’s likely that one of the following is the trouble. Be sure that the cord on your desk lamp hasn’t come unplugged from the receptacle. Check the cord to see if perhaps the cord is damaged. If so, install a new cord. Don’t just tape the cord and cause yourself problems in the future. It is also possible that the outlet or the switch controlling the outlet is defective or broken. Check for voltage and replace if necessary.
Bulbs have also been known to be loose in the socket. If so, tighten the bulb to correct the problem.
5. The Bulb Flickers – When a bulb is loose in the socket it can flicker on and off. Simply tighten the bulb to correct the problem. Another problem may be a loose wire connection. Check the connection on the fixture after turning the power off first. Contacts in the center of the socket can get worn or corroded and cause you a lot of headaches. In this case, change the socket.
7. Overheated or Burnt Bulb – Open the fixture globe or cover and check to see if the bulb wattage is too large for the fixture. on the side of the fixture is a label that states the appropriate maximum size wattage of bulb to use in the fixture. Yes, a larger size bulb usually will screw right into the socket, but that is where the trouble begins. Using a larger bulb will cause excessive heat inside the globe and cause the fixture to overheat. Due to the excessive heat, the bulb life will be much less and will likely show signs of trouble. To correct this, use the appropriate size bulb.