How to Change Gobos

A gobo is a piece of small, flat metal or borosilicate glass with a design cut out of it. When the gobo is inserted into a stage light, the light projects that design onto the stage floor or wall of the set, depending on where the light is focused. As theatrical productions change, gobos often need to be replaced. In some cases, gobos can be damaged by the extreme heat of the stage light--usually after multiple, frequent use--and, again, need to be changed or replaced.

Things You'll Need

• Gobo
• Stage light

Instructions

1. Wait until the light is cool. If you are focusing your stage lights and they have been on for a while, wait until the light is cool before sliding a gobo into its frame on the stage light. You're less likely to burn your fingers and less likely to damage the gobo.

2. Pull out the old gobo. If there is already a gobo in the light, remove it and take it with you.

3. Insert the new gobo. Carefully slide the gobo into the frame in your stage light. You may need to refocus the light slightly once the gobo is in to ensure the image is clear and where you want it to be.

Tips & Warnings

• If your theatrical company has many gobos, design a filing system so you know where to find the exact gobo you need. Filing them will also prevent damage that may occur if they are just scattered around the scene shop.

• Sometimes the edges of older gobos can be sharp.