LIGHTINGUNITS system variable
光源单位
控制使用常规光源还是光度控制光源，以及指定图形的照明单位。
| Type: | Short |
| Saved in: | Drawing |
| Range: |
0 to 2 |
| Default value: |
2 |
| Possible values: |
0: Generic lighting - this obsolete option can no longer be set but may exist in older drawings 1: Photometric lighting using American units (foot-candles) 2: Photometric lighting using International units (lux) |