Case Study: Electronics Manufacturer (Sunnyvale, CA)
Application: Manufacturing Area (Low Bay)
Improving the quality of the workplace and saving electricity were high on the priority list for this Silicon Valley manufacturer.
Replacing existing T12 fluorescents with LEP luminaires was an easy choice; the upgrade dramatically improved the appearance of the work environment and saved the company over $300 per fixture annually. Furthermore, the installation took the electrician less than a day as the new solution required only 18 LEP luminaires to replace 60 fluorescent ones.
60x4 40W Linear Fluorescent Fixtures (T12)
18 280W LEP H400 Fixtures (STA-41-02)
Highlights
- Reduced total wattage by 47% from 9600W to 5040W
- Increased light levels levels by 49% from 47ft-cd to 70ft-cd
- Improved CRI from 70 to 95 providing improved visual acuity and appearance
- Lengthened lamp replacement cycle from 2 years to 6 years, dramatically reducing maintenance costs
- 100% payback after only 24 months following the retrofit
Detailed Results
| Before | After | Savings |
| Average Fixture Power | 160W | 280W | -120W |
| Number of Fixtures | 60 | 18 | 42 |
| Daily Usage | 15 Hours | 15 Hours | N/A |
| Lamp Replacement Cycle | 2 Years | 6 Years | 4 Years |
| Annual Operating Costs |
| Electricity Consumption (kW-Hr) | 52,560 | 27,594 | 24,966 |
| Energy Cost | $6,833 | $3,587 | $3,246 |
| Maintenance Cost | $2,464 | $237 | $2,227 |
| Total Operating Cost | $9,927 | $3,824 | $5,473 |
| Payback | | | 24 Months |
| Environmental Impact |
| Carbon Dioxide Emissions | 41 Tons | 22 Tons | 26 Tons |