Newer channel letter signs are being replaced by high brightness LEDs.
2.
It is thinner and broader than a raceway, and may also be used as a backer panel for the channel letter set.
3.
Raymond Neal Best was charged with attempted murder and possession of explosive substances, in connection with the A-Channel letter bomb, and the attempted letter bombings aimed at both Calgary and Edmonton police chiefs.
4.
Since the advent of LED lighting technology, channel letters have become thinner in depth, decreasing to as shallow as 2 " to 3 " from 5 " to 6 ", a trend which began in Europe, and is seen increasingly in the United States.
5.
The most common current rating is 30 mA for general use, with 60 mA used for high-brightness applications like channel letters or architectural lighting . 120 mA sources are occasionally seen in illuminating applications, but are uncommon since special electrodes are required to withstand the current, and an accidental shock from a 120 mA transformer is much more likely to be fatal than from the lower current supplies.
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