Summary
Eight 222 nm lamps from five makers produced ozone in a chamber, in amounts about ten times larger than earlier reports. In an office test, ozone rose by about 6.5 ppb while the lamps were on. The authors note the ozone can go on to form fine particles.
Key points
- Eight lamps from five manufacturers all made ozone.
- Ushio modules made about 22 ppb per hour in a 21 m³ chamber.
- An office test showed about 6.5 ppb more ozone with the lamps on.
- Ozone can react with indoor air to form fine particles, which may affect health.
- Ventilation lowers the effect.