Response to Hi Hugh, I believe that they are referring to the 12 volt model of your pool/ spa light. You want to match the voltage bulb with the voltage the fixture was rated at.  

An image is worth 1,000 words! Add an image or two to your comment to help ensure it is understood accurately.

Yes, please email me exclusive discounts, swimming pool tips and helpful how to guides. This comment may be posted on a public site. Do not include: HTML, references to other retailers, pricing, personal information, or any profane, inflammatory language.