STUDIO LIGHTING AND PORTRAITURE RESEARCH

Ambient (General) Lighting - The soft indirect light that fills the volume of a room with illumination. It softens shadows on people's faces and creates an inviting glow in the room. 

Main Light: The main light in a lighting setup is the primary light used. This primary light source is typically the brightest in your setup, casting the most prominent shadows. 

Fill Light: In a lighting setup, the fill light refers to the light source which is used to “fill-in” the shadows cast by the main light. This source can be a flash unit, or simply a reflector that is directed on the subject to illuminate the shadowed areas and lessen the contrast. 

Diffused Light: Diffused light is softened light, with less shadows and more even coverage. A diffused light source is most commonly achieved by directing light through a translucent material, such as a diffusion shoot-through umbrella, a soft box, or a diffusion reflector panel. Bounce light: Light that is bounced off a reflective surface, such as any of the following: a white card, an aluminized reflector, a wall, or the ceiling. 

Hair Light : Light source aimed at a subject’s hair to create separation from the background and add sparkle and highlights. 

Natural light: light obtained as a byproduct of natural chemical processes. It comes from something that emits its own light, and not just reflects it. Natural light doesn't require any type of fuel to operate, it is free and renewable. 

What colour is daylight?
What your really asking is the colour temperature of a light source. The hotter a item the bluer the light is. This is referred as the colour temperature. Daylight we perceive as white. Flash is a very good approximation but if your look at the picture it is slightly bluish. 

What colour are tungsten bulbs?
The lamp formerly known as Quartz has a more stable colour temperature throughout the life of the lamp, than tungsten-incandescant. These lamps get hot and have shorter lifespans than some others. CRI is 100.

What colour does flash mimic?
flash mimics the color distribution of pure sunlight, it’s much more suited to bringing out vibrant colors than the impure ambient light available in shaded or overcast environments.