GLP are the manufacturersTim,
Nice. Do you have URL for a supplier?
RML lighting can supply or hire over here
http://www.richardmartinlighting.co.uk/
or Led-Lites
http://www.led-lites.co.uk/products.php?section=products&page=item&id=268
not cheap though £3670 guide price
I was most impressed by the beams produced through a little smoke,very punchy.