UV/LED Lamp Replacement Calculator

After computing months until replacement from rated bulb life divided by daily on-time and adjusted from working days to calendar days (lines 43-46), the engine multiplies that interval by 0.8 when Lamp Type is UV fluorescent (lines 49-51). LED and hybrid types keep the full computed interval. The adjustment reflects that UV bulbs lose curing intensity before they reach their nominal hour rating, so the recommended schedule is conservative.

Clients Per Day feeds total cures per day together with cures per client (line 26), which sets daily lamp-on hours (lines 27-28). Replace Bulbs In divides rated bulb life by those daily hours, then converts working days to calendar days using Work Days Per Week (lines 43-46), so higher client volume shrinks the interval — for example moving from three to twenty clients per day drops the LED schedule from roughly 10,234 months to about 1,535 months at default cure assumptions. That is still a much smaller swing than switching Lamp Type produces at any fixed client volume — Lamp Type, not client volume, is the dominant factor overall.

Wattage enters only the electricity branch — monthly kWh equals monthly on-time hours times wattage divided by 1,000 (line 73) — and never appears in the replacement interval formulas (lines 43-51). A higher-watt lamp raises Monthly and Annual Electricity Cost and Cost Per Cure (lines 74-84) but leaves Replace Bulbs In (months) and rated bulb life unchanged.

Total Annual Lamp Cost sums annual replacement spending — bulb sets or LED unit replacements depending on lamp type — with annual electricity (lines 68-78). Cures Per Year multiplies daily cures by work days per week and fifty-two weeks (line 81). Cost Per Cure divides that total annual figure by cures per year (lines 82-84), spreading both maintenance and power across every gel cure cycle you perform.