The Thermawood round light is effective in reducing the amount of heat lost by creating a air-tight seal around the lamp
Instillation of downlights can increase the thermal efficiency of attic/loft insulation by as much as 30% which is handy when trying to meet the building regulations
Reduce air leakage and minimise condensation risk
Improve sound/acoustic insulation also
Check out the instillation guide from Thermawood below.