Old Lighting |
New Lighting |
Results |
T8 or T12 lamps
and magnetic ballasts |
T8 lamps and electronic ballasts
(retrofit existing fixtures with new lamps and ballasts or replace the fixtures entirely) |
20 to 35% energy savings
Equivalent light output
Improved lighting appearance |
Incandescent lamps (or "bulbs") |
CFLs and LEDs
(retrofit existing fixture with new bulbs or replace fixture with a dedicated CFL fixture) |
65 to 75% energy savings
Equivalent light output
Lamp life extended 5 to 10 times |
Metal halide, high-pressure sodium, or mercury vapor high-bay lighting |
High-bay fluorescent
(new fixture required) |
40 to 50% energy savings
Improved control / instant on
Equivalent light output
Improved lighting appearance |
Exit signs illuminated by incandescent lamps |
Exit signs illuminated by light emitting diodes (LEDs) |
90% energy savings or more
Significantly longer life |