# LIGHTSINBLOCKS System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).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 --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables/LIGHTSINBLOCKS.html) · © Gstarsoft Co., Ltd.