› Forums › Spectroscopy › LED street lamps › Sky background subtraction
29 October 2017 at 10:02 pm
#578700
![](https://britastro.org/wp-content/uploads/2016/08/picture-3730-1470174999-80x80.png)
Participant
Hi Robin,
How tall a background subtraction region would you select in such situations of higher relative light pollution?
Cheers
Hugh