Difficulty: Moderately Easy
Step1
Identify the model and/or brand of the overhead projector. This can be found either on the box in which it was purchased, or on the bottom of the overhead projector itself. This information is usually printed on a sticker; colors vary from overhead to overhead, but they can be silver or white.
Step2
Look up the model number on the manufacturer's website. It should specify which light bulbs will fit that model.
Step3
Identify the appropriate type of light bulb by looking for DYS, ENX or FXL on the burnt out bulb. These letters can help you identify the right replacement light bulb.
Step4
Buy light bulbs from a discount website specializing in multimedia equipment if it's cheaper than the manufacturer's website.