MARELD 22/23 EN 1
Perform better with the right light Lumen Lumen d
escribes how much light is radiated by a light source in all directions. This is a good way of measuring how much light you get from a lamp. For comparison, a car with good dipped headlights is approx. 1200–1500 lumen. A mobile phone delivers approx. 50 lumen – compared to our head lamps that start from 145 (Gleam) up to 5000 lumen (Mila Vega). Our work lights start at 1000 lumen (Flash) and go right up to 45,000 lumen (Starburst). Colour temperature Colour temperature is used as an indicator of how the eye perceives white light. Colour temperature is measured in Kelvin, which is often expressed using the symbol K. For example, if the colour temperature is above 5000 K for a light source, the light will be perceived as cold. However, if the colour temperature is between 2700 and 3000 K, the light will be perceived as warm. Cold light glows blue-white, while warm light appears yellowish or reddish. Colour reproduction Colour reproduction is expressed in Ra, which indicates how well the light source reproduces colours. The Ra index is indicated on a scale of 0–100. Ra > 90 Excellent colour reproduction Ra > 80 Good colour reproduction Ra < 80 Poor colour reproduction Lifetime The lifetime of a light source or LED light describes the average number of hours that this particular type of light source will illuminate. LED lamps often have a service life of more than 30,000 hours, which is the equivalent of many years of lighting. This not only saves on electricity costs, but also reduces the need to replace light sources. LED lifetime is expressed in hours and describes how long the lamp can be expected to remain on at a minimum 70% of its original capacity. If a lamp has a lifetime of 50,000 hours, it will still function after that time using 70% of the amount of light it emitted when the lamp was new. IP rating IP stands for Ingress Protection and describes degrees of protection for enclosures and casings. By assigning different numerical codes, the product’s degree of protection can be identified quickly and easily. In the code IP 65, the 6 (6/6 = dust tight) describes the level of protection against solid objects and the 5 (5/8 = protected against water jets) describes the level of protection against liquids. In other words, IP 65 can handle harsh outdoor environments and the Nordic climate.