Medium‑pressure UV vs Low‑pressure High‑output UV Service‑life Comparison

Lamp end‑of‑life is defined as UV output drops to 70‑75 % of initial value.

Typical service life   continuous operation for swimming‑pool water treatment  

Low‑Pressure High‑Output   LPHO  9 000‑12 000 hours, national standard minimum ≥12 000 h

Medium‑Pressure  MPUV  5 000‑8 000 hours for premium imported lamps; 3 000‑5 000 hours for domestic standard lamps; national standard minimum ≥5 000 h

Under identical operating conditions, LPHO lamps have substantially longer service life. Medium‑pressure lamp life is roughly 40 %‑70 % of LPHO lamps.

Main influencing factors

On‑off cycles Frequent switching severely shortens medium‑pressure lamp life; LPHO is more tolerant of cycling.

Thermal dissipation  Medium‑pressure lamps run at 600‑800 °C; poor cooling accelerates lamp degradation. LPHO runs at ~100‑110 °C with low thermal load抖音百科.

Ballast quality  High‑performance electronic ballasts extend lamp life, especially for medium‑pressure UV.

Sleeve fouling  Scaling does not damage lamps directly but blocks UV transmission; regular cleaning is required.

Swimming‑pool practical reference   10 h daily running

LPHO  replace lamp every approx. 2.5‑3.3 years

Medium‑pressure UV: replace lamp every approx. 1.4‑2.2 years

Selection notes

For longer lamp‑replacement intervals and lower‑frequency consumable change‑out   choose LPHO.

For chloramine destruction / AOP function, accepting shorter lamp cycles   choose medium‑pressure