The Rural Voice, 2002-05, Page 18gimuld
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BARN
DEMOLITION
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WE NO LONGER HAVE
SLIPPERY FLOORS
THANKS TO...
SI' TR
We havens had any
slide and fall when in
heat '
Birchlawn Fanns
Atwood. Ont.
Q
'Production and heat
detection is up because
cows are more comfortable
and confident when walking
on the slats
='k Sevenhuisen
asvrde. Ont
The cows have more
confidence in their
Steve Shantz
New Dundee. Ont.
'Heat detection is way up
inside the bam '
Joe Vink
Kukton, Ont
'It was a must to do it, and
11 was the only way to do
Agen Pelders
Embro, Ont
'Footing and confidence of
cows has greatly improved
since Traction Milting' of
scrape alleys.'
�� Kenton Roth
— Baden, Ont.
TM
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14 THE RURAL \KAU E
"Light meters, obtained from an
electrical supplier for $75-125 U.S.,
are needed to regularly test light
intensity and the distribution of light
in the barn. A timer and photocell are
recommended to decrease annual
energy cost and increase lamp life.
Place the photocell with a time delay
where it is exposed to Tight of similar
intensity as inside the barn, but not
exposed to the artificial lighting in
the barn. When the sun comes out
brightly and provides the required 15
FC, the photocell will turn off the
lights. The delay works to even out
the irregularity of the sun and clouds'
effect on barn lighting. The timer will
turn on and off power to the lights
and photocell according to your pre-
set times.
Metal halide (MH) or high
pressure sodium (HPS)
lights are an energy
etticient way to provide lighting in
freestall barns. HPS lights cost more
to purchase, but have a lower
operation and maintenance cost and a
10 per cent longer life. However,
HPS light is not as full spectrum as
MH and certain dairy workers find it
High pressure sodium
light is not full
spectrum. Some dairy
workers find it difficult
to work in
difficult to work in.
"Mounting height is typically 5-12
meters depending on wattage. To
provide even lighting in the barn,
mounting height is related to lamp
wattage. As mounting height is
decreased, more fixtures of lower
wattage are required to Tight the area
while minimizing spotlighting and
dark places in the barn. Spacing of
features is typically 1.5 times the
mounting height.
"Fifteen FC represents 15
footcandles, the minimum intensity
required for the Tight period. These
represent the K, a constant that
accounts for light reflected in and
escaping from the barn. Use K=2 in
enclosed barns and K=3 in open -
sided freestall barns.
"For example, a 10,000 square
loot barn being lit by 250 watt
(20,500 lumen) metal halide Ifghts