Lighting
The 2018 IRC/IECC requires that 90% of the permanently installed lighting fixtures utilize high efficacy lamps. (This is an increase from the 75% required under the 2015 codes.)
High efficacy lamps are defined as:
- Compact fluorescent lamps (CFL's) OR
- T8 or smaller linear fluorescent lamps OR
- Other lamps that meet the following efficiacy:
- >40W - 60 lumens per watt
- 15-40W - 50 lumens per watt
- <15W - 40 lumens per watt
