Summary
Switching to LED light bulbs is a quick and affordable retrofit measure. LED bulbs are far more energy-efficient than traditional bulbs and use up to 90% less energy.
To achieve quick savings, upgrade your incandescent bulbs immediately and replace fluorescent bulbs as they expire. LED bulbs are now available to fit almost all light fittings, though the dimmers and transformers of some lights might need to be replaced.
Avoid leaving holes in the insulation caused by fitting downlighters and when decorating, choose surface mounted lights. For lights that have already been installed, an off-the- shelf fitting can create an airtight seal over the light.
Cost/difficulty
LOW COST
LOW DIFFICULTY
Applicability in Letchworth
Applicable – No specific requirements.
Links to further information
- Energy Efficiency Guide for Letchworth Garden City residents (2024), page 6
- HCCSP Retrofitting Your House Guide (2024), page 15
- The Surrey Home Energy Improvement Guide (2025), page 38
Image credit – Daniel Reche from Pixabay
This guidance is part of Lighting