Osram has announced an LED module to enable rapid upgrading of historic street luminaires, independent of the original manufacturer. The module is prepared upon request so that fitting is as simple as replacing lamps or sockets.

Osram claims that, compared with mercury-vapor-discharge lamps, the DSL cuts energy consumption of luminaires by at least 60 per cent. Upgrading is less than half the cost of a new LED installation.

Standardized LED-based replacement modules are available for many luminaire models with modern designs, but this is not the case for non-standard heritage luminaires.

Osram offers a service that begins with the lighting owner – such as a local authority or city council – sending a luminaire to Osram. A construction kit, consisting of an LED module and mounting plate, is adapted by Osram specifically for the luminaire in question. Then, an employee from the town's works department is able to install the module with the minimum of effort. 

As well as offering improved energy efficiency and durability, the modules, which are fitted with Osram’s Oslon SSL LEDs, provide high levels of color rendering. The DSL also enables more targeted control of light compared to classic lighting, for example by choosing the correct number of LEDs in order to reduce light spill in certain circumstances.