When I reconfigured my sump to accommodate both a skimmer AND a refugium, I realized I had to light it, too. Fortunately, I'm blessed with being cheap and with access to a business that manufactures emergency vehicle lights. (Don't ask, I'm not going to say who.) So I give you my kitbashed 30W refugium light, illuminated by SAE J845-compliant Police Red:
Don't worry, I'm going to isolate that power supply from the elements. (And I'm way below the ampacity of those wires.)
Don't worry, I'm going to isolate that power supply from the elements. (And I'm way below the ampacity of those wires.)

