WHAT DOES LIGHT BULB COLOR TEMPERATURE MEAN?

by | Jan 29, 2017 | Lighting, Interior Lighting, Outdoor Lighting | 2 comments

What does light bulb color temperature mean? That is a great question. My day job has me wearing to different hats as far as job responsibilities are concerned. My primary job is Director of Information Technology but I am also head of facility maintenance and have been for nearly 30 years. In that time frame I have become somewhat of a lighting snob. This also means I am very sensitive to the color temperature of lighting. Just like at the day job I like my home lighting a certain way and color temperature, color rendering index (CRI) and lumens are the key.

What does light bulb color temperature mean? It means confusion for consumers.

In an office or Industrial environment attention is always or should always be paid to light bulb color temperature. Now home owners and consumers are being forced to do the same.

In the old days of incandescent lighting you would simply buy a light bulb based on wattage and the choice of warm white, cool white or daylight. Buyers without much thought would simply match and buy the same bulb style they were replacing. None of this color temperature nonsense. Now in the days of LED bulbs buyers are faced with options of color temperature, lumens, CRI and wattage equivalent.  I hear people in Home Depot and Lowes comment “Buying light bulbs shouldn’t be this hard”. Online Q&A’s share the same sentiments. Consumers looking to replace incandescent lights with LED’s should not worry about CRI or even lumens. Your local Home Depot and Lowes wont have enough choices for these details to be a concern in bulb selection.

What does light bulb color temperature mean?

Question – What does light bulb color temperature mean?

Answer – Simply put the color of the light you see when you turn on a light bulb. Color temperature is displayed as a number like 2700k which really means 2700 Kelvin. Kelvin is the measurement system used to measure the color temperature of light. All light bulb types and technologies use the same Kelvin system. Incandescent (Tungsten), CFL, Fluorescent, High Pressure Sodium, Metal Halide and of course LED.

What does light bulb color temperature mean?

Light Bulb Color Temperature Comparison Chart

Light Bulb Color Temperatures

2700K-3000K – Warm White – 2700K is the warm yellow light most think of when thinking of a normal light bulb. It’s the light humans have been seeing for millions of years in fire and candle light. 2700K is great all around the house except in the kitchen or task reading light. Use 2700K for a warm cozy light. 3000K is slightly whiter. In LED’s I often find I prefer 3000K.

3500K-4100K – Cool White – Cool white is neutral and great in the kitchen, bedroom and to read by. It’s typically used in offices,reception areas where you want a clean bright white that is still warm and inviting. I suggest 3500K unless you want more white

5000K-6500K – Daylight – Daylight has a blue tint. The higher the temperature the more blue the light. Daylight bulbs are what you often see in grocery stores, hospitals, galleries, museums. It’s a good choice where women are applying make-up and doing their hair.

LED Light Bulb Recommendations

Im often asked what led light bulbs to I use and where do I use them. I hope you find the information useful. Note: I buy nearly all my LED’s online so I can get exactly what I want. Below will be the links to the LED’s I currently use.