The LED Light has come of age:

A guide to recent developments in lighting technology for use when caving

Chris Snell M.Eng.(Hons) MIET.           c.e.snell@iee.org

Devon Speleological Society                2007/2008

Abstract

The latest generation of white LEDs (Light Emitting Diodes) are now the most efficient sources of white light, producing more light per watt than any other white source.

This report is split into three parts:

In part 1 I consider the use of these LEDs in cave lights. I look at the history of the LED, I will discuss issues relating to colour, beam pattern and heat generation. I introduce the circuitry required to drive the LEDs and the battery technologies used as a power source.

In part 2 I focus on current commercial cave light designs, including modules that can be retrofitted into existing cap lamps.  Where possible the light designs are reviewd and compaired.

In part 3 I introduce a simple design that can be made by anyone who is good with their hands and has a basic engineering knowledge. The proposed design is analysed; possible improvements and or customisations are presented.

I conclude that if you are not using white LED lighting you should be, and that in the next few years we can expect some very interesting products.