A dimming unit arranged for dimming a Light Emitting Diode, LED, based lighting device, wherein said dimming unit comprises a switch arranged for receiving an Alternating Current, AC, mains signal and for providing a supply signal to said LED based lighting device based on a switch control signal, a controller arranged for providing said switch control signal, and comprising a lookup table comprising a relationship between a current range of a preconfigured LED based lighting device and a brightness range of said preconfigured LED based lighting device, a dimmer arranged for providing a dimming level to said controller based on an input dimming range, wherein said controller is further arranged for translating said dimming level to said switch control signal such that said brightness range is linear to said input dimming range using said lookup table.
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