Have you ever looked at a light bulb and wondered what watts or lumens are, ending up googling to solve the mystery? Or maybe you’ve heard about lux or kelvin but never quite understood what they mean?


We know that lighting can seem like a complex world, full of technical terms and numbers that don’t always make sense at first glance. But it doesn’t have to be that way! To simplify things, today we’re going to unravel all these luminous concepts.




Lumen: The radiance that enchants


Let’s start with the basics. Imagine walking into a space and being immediately embraced by a soft, welcoming light. That feeling can be quantified by lumens (lm), which represent the measure of the amount of visible light a light source emits in all directions. The higher the lumen rating, the “brighter” the light source will be.



Lux: the lighting that defines environments


Have you ever thought about the difference that the right amount of light can make in a space? This is where lux (lx) comes in, the measure that defines the intensity of light reaching a surface. This measurement is crucial for determining the appropriate level of lighting for different activities and spaces.



Candela: intensity that captivates the eye


Candela (cd) is the unit that measures the luminous flux of a light source radiating in a specific direction. It’s especially relevant for directional light sources, such as spotlights or reflectors, where the concentration of light in a specific area is important. This uses an imperial measurement system (feet), whereas lux uses a metric system (meters).



Kelvin: spaces shaped by color


The color temperature of light can completely transform your experience in any environment. Using Kelvin, the unit of measurement for color temperature, we can determine if the light will be warm and inviting (yellowish tones) or energizing (bluish tones).
For instance, lights with a low color temperature (between 2700K and 3000K) are softer, while lights with a high color temperature (above 5000K) are ideal for work areas. Essentially, the higher the Kelvin, the whiter (cooler) the light. Conversely, the lower the Kelvin, the more yellowish (warmer) the light will be.




Watts: efficiency that reduces consumption


Although it is not a direct measure of brightness, watts (W) are often associated with the energy consumption of light bulbs. They indicate the amount of energy a bulb consumes to produce light.
However, with the advancement of LED technology, it’s important to understand that fewer watts can mean more lumens, resulting in energy efficiency without compromising light quality.



UGR: evaluating visual comfort


Visual discomfort can spoil even the most beautiful of spaces. That’s why the Unified Glare Rating (UGR) is crucial, as it assesses how much glare a luminaire produces and introduces into an environment.
Glare is important because it can negatively impact in various ways, causing discomfort, headaches, reduced productivity, or lack of concentration. Considering these factors, it’s important to note: the lower the UGR value, the less direct glare and, consequently, visual discomfort.



CRI: bringing colors to life


Finally, the CRI (Color Rendering Index) indicates the ability of a light source to accurately reproduce colors in objects and spaces. Evaluated on a scale from 0 to 100, it signifies how well a specific light source renders color compared to a reference light source, typically sunlight. For reference, the higher the CRI, the better the color reproduction capability, meaning colors will appear more natural and vibrant under the lamp’s light.



Now that you know what lumens are, how lux affects your home, the importance of candela in creating cozy atmospheres, and the crucial role of kelvin, it’s time to put this newfound knowledge into action!


Experiment with different color temperatures and adjust the light intensity according to your needs.


Our mission for today is complete. We’re here to help you illuminate your world in a way that’s both functional and aesthetically pleasing, believing that knowledge is key to creating truly special spaces.


Are you ready to see the light at the end of the tunnel? Let’s begin this journey together!