Davy has designed the lighting for more than 250 opera productions throughout Britain and for most major European opera companies from Antwerp to Zürich, as well as in Australia and North America.

His work encompasses huge lighting installations on the lake at the Bregenz Festival as well as the intimacy of Mozart at Schönbrunn Palace. Several of the productions he has lit in recent years have been revived by opera companies all over Europe and beyond.

He made his debut with the National Theatre of Scotland in 2011 and lights regularly for Dundee Rep and the Rapture Theatre Company. He has lit theatre productions for Druid Theatre Company in Ireland and the USA; for The Gate and The Abbey in Dublin; the opera and theatre companies in Perm, Russia; major West End and Broadway productions; at the RSC and for the National Theatre, the Old Vic and British regional companies.