Only one or two of the bulbs light up, what do I do?

There could be a couple reasons why a bulb does not light:

1. The bulb is not fully seated - Turn off power at the wall switch, let the bulb cool, remove the glass shade and make sure the bulb is screwed in securely.
2. The bulb has reached the end of its life - Replace it with a bulb of the same type and wattage.
3. The socket ring is loose - Use the included socket ring tool to tighten the socket ring, then reinstall the bulb.