# CONVERTOLDLIGHTS Command [GstarCAD 2019](Help%20System/GSTARCAD/2019/Index.md) → [Commands](Help%20System/GSTARCAD/2019/Commands/(Commands).md) → [C](Help%20System/GSTARCAD/2019/Commands/C/(C).md) The CONVERTOLDMATERIALThe CONVERTOLDLIGHTS command is used to convert the format of previous light resource into format of current. **Command Access:** > **Command:** CONVERTOLDLIGHTS Function Description: The light resource is created by graphics file formats and it could be converted into current format. **Note:** this kind of conversion may not be correct in all cases. ## Other versions with matching text [GstarCAD 2016](../../../2016/Commands/C/CONVERTOLDLIGHTS%20Command--cf5109c9c833.md) · [GstarCAD 2017](../../../2017/Commands/C/CONVERTOLDLIGHTS%20Command--cf5109c9c833.md) · [GstarCAD 2018](../../../2018/Commands/C/CONVERTOLDLIGHTS%20Command--cf5109c9c833.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/Commands/C/CONVERTOLDLIGHTS%20Command--cf5109c9c833.md) · [GstarCAD 2021](../../../2021/Commands/C/CONVERTOLDLIGHTS%20Command--cf5109c9c833.md)