As an example, if you place a 100 lumen bulb in a flood light that shines on only one square meter of surface, that surface will be lit at 100 lx. If the lamp displays its brightness as a measurement of lux, it usually lists a distance from the bulb since any change in distance or bulb type changes the lux level. A single lux is equal to one lumen per square meter. Lux (lx) measures illuminance, which is the amount of light on a surface per unit area. The Las Vegas hotel right? Wrong, that’s the Luxor. Again, candela is the luminous intensity which describes how bright a light source is. This is because the same intensity of light can be seen from any non-obscured direction at the same distance. If you have a light bulb generating 1 cd and block part of the light, every direction not obscured still produces 1 cd. A simple comparison is that 1 candela is roughly equivalent to the light from a single candle. Laser pointers or spot lights have the highest candela rating since the majority of their light is focused in a single direction. This is different from lumens (a total light output) because it’s the value of light intensity from any point in a single direction from the light source. Any light source eventually becomes too dim to see the further away you are. It tells you how bright the light source is which shows how far away from an object you can be and while still being able to see it. Candela is the base measurement for describing luminous intensity. We’ll start with candela (cd) – also commonly called candlepower. Let’s break it down into the long answer to dispel a few more shadows. The short answer is that they’re all separate standards for measuring different kinds of lighting effects. Inside, you question why no one uses the same system for measuring these things, and take your best guess based on the other items on the shelf. ![]() You walk into a store, pick up light bulb or a handheld spotlight and look at the specifications- only to find that one says lumens, another says lux, and the last reads something about candela.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |