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Jeremys LED Lighting Page.pdf

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Cooking by the light of a single 2W LED

Gentler lighting from 4W of up lighters

White LED's use between 3 and 3.8 volts each depending on how hard they're being pushed, and
this voltage will reduce as they get hot. For this reason all manufacturers of LED illuminants advise
the use of a constant current source. Other manufacturers have marketed various little devices to fill
the need, but they are all expensive and require over 2V overhead to work, for reasons unknown.
This means that they are unable to run 3 LED's at full power (3.7+3.7+3.7+2 = 13.1) from any leadacid battery I've ever used except while it's being charged – in other words during the day on a solar
12V system. Not very helpful.

A Single Candle

2x8W Strip lights

2 LEDs at 0.5W total

2 LEDs 2W total

2 LEDs 4W total

2 LED's 6W total

These 6 photos were taken with the camera set on manual exposure for
comparison (f2.8, ISO1600, 1/30th second)