# LIGHTSINBLOCKS System Variable [GstarCAD 2017](Help%20System/GSTARCAD/2017/Index.md) → [System Variables](Help%20System/GSTARCAD/2017/System%20Variables/(System%20Variables).md) → [L](Help%20System/GSTARCAD/2017/System%20Variables/L/(L).md) **Function Description:** The LIGHTSINBLOCKS system variable is used to control whether to use the light contained in block when rendering. | | | | --- | --- | | Type | Integer | | Saved in | Drawing | | Initial value | 1 | | Range | 0,1 | When this system variable is off, the light in block has no effect on 3D objects rendering in current viewport. **System Variable Value:** **0:** turn off light in blocks **1:** turn on light in blocks --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/L/LIGHTSINBLOCKS%20System%20Variable--213850d178b6.md) · [GstarCAD 2018](../../../2018/System%20Variables/L/LIGHTSINBLOCKS%20System%20Variable--213850d178b6.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/L/LIGHTSINBLOCKS%20System%20Variable--213850d178b6.md) · [GstarCAD 2020](../../../2020/System%20Variables/L/LIGHTSINBLOCKS%20System%20Variable--213850d178b6.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/L/LIGHTSINBLOCKS%20System%20Variable--213850d178b6.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/L/LIGHTSINBLOCKS%20System%20Variable--213850d178b6.md)