LED modules are complete LED units that are designed to be replaceable at the end of their life, in the same way as a traditional light source can be replaced. The major benefit of using LED modules is the opportunity to replace the product at end of life, or to upgrade the luminaire to newer, more efficient LED light sources as they become available.

Typically a LED module comprises a LED COB (Chip-on-Board) product, which is mounted on a carrier device. The LED module is twisted or screwed onto a holder which is, in turn, mounted on a heat sink within the luminaire.

Generally speaking, the use of LED modules results in additional thermal losses, compared to using bonded types of LED light source. This will result in a slightly lower final efficacy, compared to bonded light sources. However the design of the luminaire and use of a thermal compound to facilitate improved heat transfer can mitigate this disadvantage to a very great extent while retaining the benefits described above.

Some LED modules offer tool-less replacement, while others require the use of a screwdriver.

The term LED module encompasses a wide range of different types of product, many of which mount onto a Zhaga compliant base or footprint. Zhaga is an international interface specification that enables interchangeability of LED light sources from different manufacturers. Zhaga compliance therefore provides customers with a wider choice of light sources through the life of the lighting installation.