• Lamps-commonly called light bulbs-produce light. When comparing lamps, it's important to understand the following performance characteristics:
  • Color Rendering Index (CRI) - a measurement of a light source's accuracy in rendering different colors when compared to a reference light source with the same correlated color temperature. The highest attainable CRI is 100. Lamps with CRIs above 70 are typically used in office and living environments.

  • Correlated Color Temperature (CCT) - a measurement on the Kelvin (K) scale that indicates the warmth or coolness of a lamp's color appearance. The higher the color temperature, the cooler the color appearance. Typically, a CCT rating below 3200 K is considered warm, while a rating above 4000 K is considered cool.

  • Efficacy - the ratio of light output (lumens) to input power (watts). The higher the efficacy, the more efficient the lamp.

Real Estate Market Value Price Expert Home Inspection Repairs Improvements

Figure 110: Every lamp represents an opportunity to be more energy efficient.

Basically, you should try to use the most efficient lamp possible while maintaining the proper color rendering qualities required by a specific lighting application.

  • Lamp types include:
  • Incandescent Lamps

  • Fluorescent Lamps

  • Compact Fluorescent Lamps

  • High Intensity Discharge Lamps

  • Low-Pressure Sodium Lamps

  • Solid-State Lighting

Log in to comment