From: Equivalence between solar irradiance and solar simulators in aging tests of sunglasses
Radiant exposure (MJ m−2) | Photoperiod (h) | Lamp–sun equivalence (days) | ||||
---|---|---|---|---|---|---|
Solar | Lamp | |||||
Direct | Diffuse | Global | Direct | |||
From peak to peak | ||||||
Day 172 | 1.5 | 0.5 | 2.0 | 7.8 | 4.0 | 4 |
Day 355 | 2.3 | 1.4 | 3.7 | 7.8 | 8.6 | 2 |
Daily average | 2.1 | 1.0 | 3.2 | 7.8 | 6.9 | 2 |
Lamp | 50.0 | |||||
From sunrise to sunset | ||||||
Day 172 | 3.0 | 1.0 | 4.0 | 7.8 | 10.7 | 2 |
Day 355 | 3.3 | 1.7 | 5.0 | 7.8 | 13.6 | 2 |
Daily average | 3.2 | 1.4 | 4.6 | 7.8 | 12.1 | 2 |
Lamp | 50.0 | |||||
First band peak only | ||||||
Day 172 | 0.4 | 0.1 | 0.5 | 7.8 | 1.0 | 16 |
Day 355 | 0.4 | 0.1 | 0.5 | 7.8 | 1.0 | 16 |
Daily average | 0.4 | 0.1 | 0.5 | 7.8 | 1.0 | 16 |
Lamp | 50.0 |