Can’t tell if UV is working or not

[Reef.Blue]

I just purchased an Aqua UV 25w sterilizer for my aquarium, but I have no idea if the actual bulb is working. I see no light indicators to tell if it is working or not. I tried researching, but I couldn’t find anything.

 

[Dread Pirate Dave]

Is this like the one you have?

 

[Reef.Blue]

Is this like the one you have?

Yes thank you. I just found out the new bulb I bought that I was sent from brs was used and corroded so it wouldn’t work.