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The BetaLux-E, the first in a line of slimmer,
sleeker, self-luminous sign designs from SRB. The unit is cased in high-impact
ABS fire-retardant plastic, with a matte 141 clear Lexan cover. The BetaLux-E
is 12 3/4" in length, 8 1/4" in height and 1" thick. The illuminated Exit
letters are 6" high with a 3/4" stroke and 1/8" white border which complies
with standard regulations concerning letter size. The BetaLux-E comes with
Designer Gray or Black casing and face colors of red, green, or black.
The BetaLux-E requires no electrical energy
source. The source of sign illumination is the Betalight tubes manufactured
from borosilicate (hard) glass internally coated with zinc suffide phosphor
and filled with tritium gas. Tritium, an isotope of hydrogen, emits low level
beta particles or electrons which strike the encapsulated phosphor producing
the illumination. Each letter is illuminated independently so that in the
unlikely event of failure of one light source, the sign would not be rendered
illegible.
The universal arrow configurations allow you
to install the BetaLux-E sign with no arrows, arrow left, arrow right, or
arrows in both directions. Universal mounting bracket allows for flush ceiling,
surface, or side mountings. All mounting hardware is tamperproof and included
with each unit along with complete installation instructions.
The BetaLux-E has a minimum initial brightness
at time of manufacture of 0.15 foot-lambert. The lambert, a measurement light
emitted from a device, is not to be confused with a foot-candle, which is
a measurement of external or ambient light falling on the surface of a sign.
The light emitted by the BetaLux-E at the end of its useful life (0.08 foot-lambert),
is well above the minimum brightness specified by the NFPA of 0.06 foot-lamberts.
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