Oase biOrb supply a range of replacement DC Classic LED lights for the biOrb aquariums, giving you more choice in the way to customise your set up Please note these newer lights only work with biOrb DC transformers (73114). These lights will NOT work with older AC transformers (transformer not included with this product). Please see below in the specifications to check which Oase biOrb tanks are compatible with these DC MCR & Classic Lights. Classic: A simple replacement for your Classic biOrb LED Light. A high quality replacement long life LED light for your biOrb Classic and Tube Aquariums. The LED light has a cable with a switch but no plug. The cable simply plugs straight into your existing 12V DC Transformer (not included). Please see the specifications to see which biOrb models these lights fit. The Light has a curved underside to help moisture run off the surface, this reduces the need for cleaning. The bright LED inside the unit has a 15 year or 50,000 hour life when used for 8 hours daily. Specifications Classic Lights Please note these classic LED lights do not include the biOrb trays and inserts that are needed to mount your light unit if you do not already own them. LED Light Power Will Fit Small Classic LED (Black, Silver/Grey and White) 12v DC - will NOT work with AC transformers CLASSIC 15L Large Classic LED (Black, Silver/Grey and White) CLASSIC 30, 60, 105L | TUBE 15, 30, 35L.