The invention relates to a lighting unit, comprising a first light element formed as a conventional light source, a second light element formed as a plurality of LEDs and a lamp cap. According to the invention the second light element is formed as a separate LED­ module with a fitting and a second lamp cap whereby the first and the second light elements are removably attached via the fitting and the second lamp cap, the fitting and second lamp cap providing electrical and mechanical connection between both light elements. The invented lighting unit is cost-effective and has better mixing possibilities of the light produced by both light elements.