Illumination
LED
Light emitting diodes offer some significant benefits over the many
other light sources principally connected to their low power consumption
and relatively long life. LEDs are currently used in illuminated
magnifiers but, because of their relative low light output, are
not recommended for external lighting tasks.
Artificial lighting can never replace daylight for
intensity or effectiveness but if used correctly can offer significant
benefits to the user. To obtain maximum effectiveness the lighting
should be positioned behind and slightly to one side of the shoulder
so that light can fall unimpeded on the reading matter. Any additional
magnification can then be positioned so as to avoid distracting
reflections.
There are many suppliers of suitable units including
high street retail chains, various catalogue shops and DIY stores.
Many units are also now relatively inexpensive. There should really
not be any reason for failing to optimise the level of illumination.
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