PUBLIC HEALTH RESEARCH VOLUME 3 ISSUE 11 SEPTEMBER 2015 ISSN 2050-4381 DOI 10.3310/phr03110 What is the effect of reduced street lighting on crime and road traffic injuries at night? A mixed-methods study Chloe Perkins, Rebecca Steinbach, Lisa Tompson, Judith Green, Shane Johnson, Chris Grundy, Paul Wilkinson and Phil Edwards