MATERIALS
BULBS:	borosilicate (hard) glass internally coated with zinc sulfide phosphor and filled with tritium gas. No electrical energy source is required.
ABS:	Cased in high-impact, fire-retardant ABS with matte 141 clear Lexan cover.
RATINGS
VISUAL:	LIGHT: Minimum initial brightness at time of manufacture is .15 foot lambert ( NFPA 101 requirement is .06 foot lambert). Brightness variation between letters does not exceed a ratio of 3:2.
APPROVALS:	UL , NFPA 101, Council of American Building Officials (BOCA, ICBO, SBCCI), OSHA , NRC.
MISCELLANEOUS:	EXPECTED LIFE: 20 years.
SIZE
LENGTH:	12 3/4"
HEIGHT:	8 1/4"
DEPTH:	1"
LETTERS:	HEIGHT: 6" STROKE: 3/4" WHITE BORDER: 1/8"
PRINCIPLES OF OPERATION
BACKGROUND:	While many forms of radiation are invisible, Tritium emits radiation visible to the human eye, making it perfect for exit sign applications. The minimum brightness of these signs is more than twice the level required by UL and NFPA and is very visible in darkened areas. Their light may not be as bright during the day, but the high contrast ratio of the face colors makes the sign very visible, even in daylight.
ENVIRONMENTAL IMPACT:	These exit signs contain a gas called Tritium. Tritium is an isotope of Hydrogen (atoms of an element which have different masses are called isotopes of that element). The atoms of this isotope decay and in doing so emit radiation. But do not worry, the radiation emitted by these signs is very weak and cannot even penetrate the outer layer of your skin. In addition, the gas is contained within borosilicate (hard) glass internally coated with zinc sulfide phosphor, which further protects you from exposure. The Tritium contained in these signs would only pose a health risk if it were ingested.
APPEARANCE
INSIDE MARKING:	This package conforms to the conditions and limitations specified in CFR 173.424 for radioactive material, excepted package - instruments or articles, UN2910.
OUTSIDE MARKING:	EXEMPTED RADIOACTIVE MATERIAL