Comparing Energy Cost
Linear fluorescent light fixtures replace 458 Watt Metal Halide and high pressure sodium lighting one-for-one. Linear fluorescent lights can be switched on using occupancy sensors. Most warehouses have areas that are not occupied all of the time, however since HID lighting is not instant on, the fixtures have to be powered all the time. Linear fluorescents on the other hand can be powered on only when someone enters the area. Replacing HID fixtures with occupancy switched linear fluorescent lighting will result in additional cost and energy savings.
Wattage used by various lamp types:
| Lamp Type |
HID Metal Halide (MH) |
HID High Pressure Sodium (HPS) |
Fluorescent 6 lamp T-8's |
Fluorescent 4 lamp T-5's |
Sunlight @Noon |
| Wattage |
458 watts |
458 watts |
226 watts |
234 watts |
n/a |
CRI
(Color Rendering Ability) |
65 CRI (Blue) |
25 CRI
(Yellow) |
85 CRI
(White) |
85 CRI
(White) |
100 CRI (White) |
| Learn more about lighting terminology. |
