For a photocontrol manufacturer like Long-Join, UL773 should come first. It is the most direct standard for the photocell, photocontrol,

IP ratings measure dust and water ingress. Salt spray corrosion is a chemical process that IP testing was never designed

IP66D combines dust and water protection ratings but is not a comprehensive indicator of suitability for outdoor street lighting environments.

ENEC certification for photocontrols is not a simplified version of CE with extra paperwork. It is a comprehensive technical assessment

The CB Scheme provides genuine value as a test result mutual recognition system that reduces duplicated laboratory work across more

UL1598 imposes ten specific technical requirements on photo controls as luminaire components in North American street lighting, including covering UL773

UKCA increases costs across many small areas. Testing is only part of it. The real cost is the duplicated system:

ENEC and CE are both important. They serve different purposes.
CE is the basic mark for EU market access.