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LED
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Very energy efficient, robust, many colours
|
Light is directional not 360 degrees
|
Gyekis et al. [79]
|
|
Chemical (Cyalume or glow stick)
|
Low failure rate, inexpensive, robust, many colours, 360 degrees of light
|
Light intensity is low and variable; light intensity may be affected by temperature
|
Barr [45], Holmes and O’Connor [72], Kissick [73], Kehayias et al. [84], Costello et al. [41]
|
|
Incandescent
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Widely available, 360 degrees of light
|
Uses a lot of power, emits heat as well as light, fragile
|
Faber [71], Floyd et al. [39]
|
|
Fluorescent
|
Bright, energy efficient
|
Only one colour, fragile
|
Aiken [74], Kawaguchi et al. [33], Doherty [24]
|
|
Halogen
|
Very bright
|
Requires a lot of power, must be tethered to large battery, produces heat, fragile
|
Hernandez Jr and Shaw [64], Lindquist and Shaw [86]
|
