Ex-Pro® T4 Fluorescent Tube 10w, 341mm 3400K [PACK of 5]  T4 Fluorescent Tube 10w, 341mm 3400K [PACK of 5] T4 , 341mm, 10w, Opal Glass TRIPHOSPHOR Pack of 5 Due to the usage nature of the product this product has a no return policy once opened [Please check your purchase prior to unsealing the product], it is a requirement of DSR regulations that you are aware of this prior to purchase.