# SVG lamps (the old format)
Before fixture definitions, gled described lamps and installations as SVG
files, drawn in [Inkscape](https://inkscape.org/) with their parameters
written into the description fields of the drawing.
gled no longer reads these files as they are, and a project can no longer
import one. Instead it converts them when it starts: a lamp under `svg/` in
the data folder becomes a fixture definition, and a project whose installation
is an SVG drawing gets a patch derived from that drawing. [Old lamps and
projects](../fixture-definitions.md#old-lamps-and-projects) describes what the
conversion does. New lamps are drawn in the definition editor, see [Fixture
definitions](../fixture-definitions.md).
This section describes the old format, for reading and fixing an old drawing
before gled converts it:
* [What a group is](groups.md)
* [How an SVG file for a lamp was made](lamp.md)
* [How an installation was set up](installation.md)
