On 4 Mar 2004 10:51:40 -0800, firstname.lastname@example.org (Richard) wrote:
|Thanks for all the prompt comments -- I was thinking of 4 of the 4
|tube X 4 ' fixtures for general lighting of a 16' x 20' area --
|perhaps I'll just double up the 2 tube units: I was being lazy :-)
The 4-tube 4-foot Lithonia fixtures from HD that I spoke of earlier
would be inadequate IMHO for an area this large with only four
FYI, I bought just one and mounted it and took a few measurements
before committing to more fixtures. My "shop" is one end of the
garage, which measures 28' deep by 30' wide. The fixed shop portion
is the 8' x 30' space not occupied by a Camaro and a pickup truck.
With the exception of the white painted firewall between the garage
and the living space the rest of the surfaces are unpainted I-joists,
2 x 6's, plywood and OSB.
For my "light survey" I used a 50 year old GE selenium light meter
mounted on a tripod at a fixed distance about four feet above the
floor. While the meter indicates foot-candles the cell is old and
temperature sensitive so I used it for relative measurements only.
I found that I could illuminate this space uniformly with three
fixtures, mounted side-to-side on 8' centers, with the fixture ends 2'
from the long wall and 9' high.