Can be switched off immediately after use w/o the need for cooling time. 50W LED Dual Fiber Optic Light Source Variable (20W Min - 50W Max) Microscope Illuminator Kit. Dual 50cm Gooseneck with 2x removable end diffusers / condenser lens. (50W LED is eqivalent to 500W Halogen). This item is in the category "Business, Office & Industrial\Healthcare, Lab & Dental\Medical & Lab Equipment, Devices\Microscopes".The seller is "nichjo_9884" and is located in this country: GB. This item can be shipped to United Kingdom.