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Full Spectrum Lighting: Verilux states: "Many companies have chosen to use term "full spectrum" because people instantly recognize that phrase. However, you can only achieve full spectrum in a fluorescent bulb.CRI - Color Rendering Index is a measure of how well colors can be perceived using light from a source, relative to light from a reference source such as daylight. By definition, an incandescent lamp has a CRI of 100. Fluorescent lamps with low CRI have phosphors that emit too little red light. Skin appears less pink, and hence "unhealthy" compared with incandescent lighting. CRI's typically range from 62-85 for fluorescent bulbs.
See
Color Rendering Index (CRI) | Topbulb and
High CRI Bulbs | Topbulb
Color Spectra or Temperature:
Incandescent bulb temperatures: 2800K (60W bulb), 2870K (100W bulb), 2900K (150W bulb) Source: Philips Lighting - Understanding the new Federal Energy Efficiency Legislation
Color temperature - Color temperature relates to the fact that when an object is heated, it will emit a color that is directly related to the temperature of that object. The higher the color temperature, the more 'blue' the light, and the lower the color temperature the more 'red' the light. Color temperature in a room or space can have a dramatic affect on the people that use that lighting to perform tasks. For example, rooms that are used for tasks such as reading can benefit by incorporating lighting on the cooler end of the scale. Many studies have been done on classroom and work settings where reading improves when done under lighting near 5500K (Day White - 5500-6000K).
See:
Color temperature - Wikipedia Color Temperature Tunable White Light LED System
Other Temperature Designations Color Temperature: WW - Warm White - 2700-3500K W = White 3000-3500K CW - Cool White - 4000-5000K P = Full Spectrum 5000-5500K (sometimes shown as 4000-4200) D - Daylight 6000-6500K (Note: for photography daylight is 5000-5500) (Note: I couldn't find what P stands for. Some links have P = Black Body or Planckian) See Color Temperature at light in tech.Terms: CCT - Correlated colour temperature CRI - Color Rendering Index Lumen (lm) - Measure of light brightnessLinks: Light Color temperature - Wikipedia
What the Big Box Stores Won’t Tell You About LEDs - The Lightbulb Co.
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