In the lamp measurements overview on OliNo the following lamp parameters can be found:

Efficacy, in Lumen/Watt

This for us the most important parameter. The higher the number, the more efficient the lamp is generating light. We want to lamp to produce as much light as possible and less heat. Heat is loss of energy. Generation of excessive heat will also reduce to lifetime of the product, this is especially true for LED lamps. The overview table is sorted on efficacy, the most efficient lamps are on top.

Color Temperature, also called (C)CT, in Kelvin

The color temperature value is an indication how the light feels like. Is it warm white or cold white light. A lamp with a CCT of 4000K or higher is cold white (like daylight), the lower the temperature, the warmer the light feels. Color temperatures below 3100 are considered as warm white.

Beam Angle

Lamps with a small beam angle (less than 30 degrees) are called spot light and have very focussed light. A lamp with a small beam angle typically generates a nice ambient atmosphere. Lamps with a wide beam angle (more than 60 degrees) are called wide-beam lamps are can light up a whole room.

Luminous flux in Lumen

Shows how much light is generated by the lamp. This number can be used to compare with other lamps.

CRI_Ra or Color Rendering Index

The CRI is an index, a measure, that tells something about how colors are represensted by light coming from a certain light bulb, compared to how the colors are rendered with the light coming from a reference illuminant. 100 is the maximum number. A value of 80 is for normal usage (reading books, working in the office). When the lamp is used for generating a nice atmosphere the CRI value can be lower. More information about CRI can be found in the article A close look at the Color Rendering Index (CRI, or Ra)