What is a UV Flood Light?

What is a floodlight?

Floodlight is the most widely used light source in the production of renderings, and standard floodlights are used to illuminate the entire scene. Multiple flood lights can be applied to a scene.

In order to produce a better effect, the light bulb for shooting is packed into a large reflective umbrella for use as a high-brightness diffused light source. Although it is indispensable for lighting in the studio, it can also be regarded as one of the light sources with good lighting effects for general amateur indoor photography.

Floodlights are not spotlights, projection lights, or spotlights. Floodlights produce highly diffuse, non-directional light rather than a well-defined beam, resulting in soft and transparent shadows that fade more slowly when used for object lighting than when illuminated by spotlights.

There are even flood lights whose illumination fades off very slowly, appearing as a light source that does not cast shadows. Spotlights, on the other hand, cast a directional, well-defined beam of light that illuminates a specific area.

How floodlights work?

The traditional electric light source, whether it is an incandescent lamp or a high and low pressure gas discharge lamp, is composed of a glass bulb and a filament. Electric energy enters the bulb through the filament and is converted into light energy.

The floodlight is by inductively coupling high-frequency electromagnetic energy into the bulb, so that the gas in the bulb avalanche ionizes to form plasma, and when the excited atoms of the plasma return to the ground state, they spontaneously radiate 245nma ultraviolet rays, Phosphors are excited by ultraviolet light to emit visible light.

Floodlight is a new type of electric light source based on the combination of two well-known principles of fluorescent lamp gas discharge and high-frequency electromagnetic induction.

Because it does not have the filament or electrode necessary for conventional electric light sources, it is also called electrodeless lamp; usually the working frequency of low-pressure gas discharge high-frequency electrodeless lamp is 2.5~3.0MHz, that is to say, the operating frequency of floodlight is higher than that of ordinary The operating frequency (50Hz) of incandescent lamps and daily-used inductive fluorescent lamps, metal halide lamps, high-pressure sodium lamps and other lamps is 50,000-60,000 times higher than that of ordinary energy-saving lamps or electronic ballasts (30-60KHz). ) about 250 times higher.