Why Lighting is the "Low Hanging Fruit" of Energy Efficiency
Of all the energy-saving upgrades you can make to a property, none offers a faster return on investment than switching to LED (Light Emitting Diode) bulbs. While a solar installation may take 7–10 years to pay for itself, a full LED retrofit often pays back in just 4–8 months.
Wattage vs. Lumens
In the past, we bought bulbs based on Watts (how much electricity they consume). Today, we measure output in Lumens (how much light they produce).
To produce 800 lumens (the standard "daylight" brightness):
- An Incandescent bulb uses 60 Watts.
- A CFL (Compact Fluorescent) uses 14 Watts.
- A modern LED uses only 8.5 to 9 Watts.
The Hidden Benefit: Heat Load
Traditional incandescent bulbs are essentially small space heaters that happen to emit light as a byproduct. About 90% of the energy they consume is released as heat. In the summer, this increases the load on your air conditioning system. By switching to LEDs, you're not just saving on the light itself; you're also reducing your cooling costs.
Longevity and Maintenance
Maintenance is often the most overlooked cost of traditional lighting.
- Incandescent life: ~1,000 hours.
- LED life: ~25,000 to 50,000 hours.
If you leave a light on for 5 hours a day, an incandescent bulb will burn out in 200 days. An LED will likely last for over 13 years. For commercial properties with high ceilings, the labor savings of not needing a ladder every few months often outweighs the energy savings.