Spa light issue

So I have a pentair spa light t4/e11 bulb went out so replaced it. Long story short it still didnt work. So the pool light and spa light have separate hot wires with grounds hooked up on the ground bar and neutrals hooked together. I switched the wires to have the spa light connected to the pool light hot wire and it worked. I have 120v at  gfi and at relay out but at the hot wire for spa it says 24v. Where am I losing power at? I’m stumped. Could the aqua logic pl-4 have an issue or am I crazy?