36 Watt straight pin fits the 24 gallon deluxe nano cube as well as any other 36 Watt straight pin socket.
All 36 watt bulbs are no longer made. You will need to upgrade to led hoods.
We are a Dealer/Reseller of the Transworld Aquatics Line of JBJ Products. For warranty information please contact us and we will fwd you to the correct place. Most of their products carry at least a 1 year warranty.