An illuminated sign is a fixed electrical installation with a maintenance obligation, and a half lit fascia does more damage to a business than no sign at all. Most of what we attend is an LED driver rather than the LEDs themselves.
For portfolios, the useful arrangement is a scheduled check across sites plus a reactive service for damage, rather than treating every fault as a new project with a new quotation.
Any work on the power supply is carried out to the standards set by NICEIC, the electrical contracting accreditation body.