| Applications: Lighting: Energy Efficiency
Energy savings will depend on:
- Wattage of bulbs
- Efficiency of ballasts
- Dimmability through occupancy or daylight sensing
- Hours of operation & cost per kWh
- Operating temperatures
Lighting Retrofits: As a general rule, switching from older lighting types - HIDs or T-12s - to newer T-8s or T-5s can save about 30%+ of the wattage used. There are other improvements, such as high-efficiency reflectors which can also improve performance. The following table outlines average savings you can expect from these upgrades.
| SWITCHING FROM |
AVG ENERGY USED |
SWITCHING TO |
AVG ENERGY USED |
AVG SAVINGS |
| HID Lighting with magnetic coil |
460 Watts |
HID Lighting with digital ballast |
400 Watts |
15% |
| Standard reflector |
400 Watts |
Higher quality reflector |
360 Watts |
10% |
| HID or Fluorescent (T-12) fixtures with magnetic ballasts |
400 Watts |
Fluorescent fixtures with digital ballasts and T-8 lamps |
280 Watts |
30% |
| Fluorescent fixtures with digital ballasts and T-8 lamps |
280 Watts |
Fluorescent fixtures with digital ballasts and T-5 lamps |
225 Watts |
20% |
| Occupancy sensors |
or daylight sensors |
can save an |
additional |
10-20% |
|
