This is a common myth. Increased lighting does not reduce crime or improve safety[0,1], especially not poorly designed lighting - like the excessively bright and blue-tinted spotlights - which can even make things worse[2], by increasing glare, preventing our eyes from adjusting to the night, and increasing the number and contrast of relative dark spots.

Regardless, if one still lights up their own property due to anxiety, it's not a justification for causing light pollution. That light should remain on their property with angling and shielding.

[0]https://www.ojp.gov/ncjrs/virtual-library/abstracts/chicago-...

[1]http://jech.bmj.com/content/early/2015/07/08/jech-2015-20601...

[2]https://theconversation.com/more-lighting-alone-does-not-cre...