20230809-深入浅出学习舞台灯光

agenda

different kinds of lighting

indoor lighting

studio lighting

film lighting

architecture lighting

theater lighting

stage lighting

golden rules of stage lighting

safety first

fixture location is the key

to hide not to show

golden rules

light sources

in which ways can we produce light?

what are the pros and cons?

incandescent 白炽灯

a wire filament heated to such a high temperature that it glows with visible light

efficiency low
heat high
cooling no
color 2700k-3500k
life 2000 hrs
power AC
dimmable yes

halogen 卤素灯

an incandescent lamp consisting of a tungsten filament sealed into a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen

efficiency low
heat high
cooling no
color 2700k-3500k
life 3600 hrs
power AC
dimmable yes

Fluorescent 荧光灯

a slow pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light

efficiency high
heat low
cooling no
color 2700k-6500k
life 5000 hrs
power ballast 镇流器
warm up long
dimmable no

discharge 放电灯

a high-intensity discharge hid lamp is a type of electrical lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz of fused alumina arc tube

efficiency high
heat low
cooling yes
color 6500k-8000k
life 4000 hrs
power ballast 镇流器
warm up long
dimmable no

color temperature

the color temperature of a light source is the temperature of an ideal black-body radiator that radiates light of a color comparable to that of the light source

sources-LED 发光二极管

a light-emitting diode LED is a two-lead semiconductor light source

efficiency high
heat low
cooling yes
color mixing
life 50000 hrs
power DC
warm up short
dimmable yes

sources-Laser 激光

a laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation

fixture specification

wattage

beam angle / field angle 25 degree

beam type beam spot wash

color temperature kelvin

color mixing RGB CMY

fixture positions

front light 面光

to show the face not to create atmosphere

vertical angle 45 degree to 60 degree

use only white color

dont keep changing the brightness

back light 背光

a light source behind the actor helps to give depth to the stage by separating the action from the scenery

vertical angle 0 degree to 60 degree

strong colors can be used to create atmosphere

can also be used to spread beams into audience in order to extend the stage

down light 顶光

color wash

eliminate shadows

side light 侧光

hightlight the contour of the figure

can only have one side

fixture types

controller

lighting design process

demo