When purchasing a LED bulb you should pay attention to the amount of Lumen and Kelvin it produces. Lumen tells you the light output. The more lumen, the more light the LED bulb gives. Kelvin gives you the color of the light. The smaller the degrees Kelvin, the warmer the light of the LED.
| Color temperature in Kelvin (K) | Description light color |
| 2000 - 2500K | yellowish white |
| 2500 - 2900K | extra-warm white |
| 2900 - 3300K | warm white |
| 3300 - 5000K | neutral white |
| > 5000K | cold white |
LUUMS created a color diagram (below) so you can easily see the differences in color temperatures.
Tuesday 1 October 2008 - Interact Holdings Group, Inc. becomes the exclusive distributor of LUUMS LED product lines in the United States. Read more
Tuesday 6 januari 2009 - LUUMS placed a testing set-up of 2 different Streetlight models in Nigeria. Read more
Luums made a adjustment in the streetlight and growlight armatures which results in 30% more light output. Read more