Fluorescent tube guards for T8 or T12 fluorescent lighting that you would use in standard light fixtures. These will fit over any fluorescent lamp that you have in 4 foot lengths or less. They have end caps which allow the pins to come through to make the electrical connection. You can use them to prevent breakage from spilling into the environment or simply to change color to get a desired effect. It's a great way to add color to any light fixture that you might need for something fun or a way to indicate a special area or caution.