Genuine Evolution Aqua Osram 18W PLL UV Bulbs Please note: these are genuine Evolution Aqua bulbs! Please make sure you check the bulbs size before inserting to make sure it will fit, as we accept no responsibility if you damage your quartz or filter trying to fit it. UV bulbs should be changed every 6 months Please check your manual to make sure you purchase the correct wattage/size. Includes plastic bracket to keep bulb safe within the quartz sleeve
