*Please note* you must replace your bulb with exactly the same number of tubes, the same number of pins and the same wattage, otherwise your replacement bulb will not work.
Compact fluorescent lamps with 2-pin or 4-pin fittings are used with luminaires containing control gear to match the characteristics of the lamp. Different fittings are designed to ensure that only lamps of the correct rating can be installed thus matching the lamp to the control gear. Most lamps are available in a variety of colours ranging from extra-warm white (827) to cool white (840) and sometimes daylight (860 or 865).
Please refer to our colour reference table for more information.
This is quite normal, most CFLs rattle with parts designed by the manufacturer and doesn't necessarily mean it is faulty.
Which version of CFL is dimmable?
The only dimmable versions are the 4-pin lamps, using the correct control gear. 2-pin lamps aren't dimmable.
These names are the Manufacturer and brand name of the CFL that you have.