"Stefek Zaba" wrote in message
...
Winged Cat wrote:
Hi

concentrate most of the light into a 20-degree-or-so beam, the mfrs also
make wider-angle blubs which roughly double that angle (38 degrees is
the nominal figure in my head), which can help to give more of a wash of
light than a number of illuminated pools.

You can also get 60 degree bulbs.