Over 50 Five-Star Reviews on Google. +150 Projects Completed in the Last 10 Years. Lumiel is a trusted and certified electrical services provider in London, delivering innovative and sustainable energy solutions. Based in Sutton, South West London, Lumiel London specialises in safe, efficient installations for residential and small commercial properties. Services include rewiring, EV charger installations, solar panels, fuse board upgrades, smart home systems, landlord certificates, outdoor lighting, smoke alarms.