Obtaining good lighting from battery power has never been easy unless fluorescent lamps are used. This is because fluorescent lamps produce far more light output than incandescent lamps for a given power input.
In practice, this means that you can burn your lights for
longer before the battery goes flat – up to five or six times longer, in
This "Compact Fluorescent Driver" is built into a sturdy metal
case and is specifically designed to drive CFLs. It delivers a 240V (340V peak)
waveform that’s approximately sinusoidal in shape, which means that it’s capable
of driving CFLs with a high power factor, as well as earlier designs with low
Note that, in general, this circuit is not designed to power
other mains-operated equipment.
The output voltage produced by this CFL Driver circuit is
potentially lethal! Do not build it unless you are experienced and know what
you are doing.
In particular, make sure that you do not touch the output leads
and check that they are securely connected to an approved mains lighting socket
in a fixed installation before connecting 12V DC power. Treat these wires as
though they are at mains potential.
Finally, be sure to keep your hands away from the PC board components
associated with the output terminals, diodes D7-D10 and the 470kΩ and 1MΩ resistors in the