DMX vs. Phase Dimming (fluorescent fixtures)

C

colabean

Member
Are these two different dimming technologies? If so, what should I know about them to help make best choice when buying fluorescent lights (Arri Studio Cool)
 
DMX is just a data protocol for communicating with all kinds of lighting instruments. It's typically implemented in a 3 or 5-pin XLR cable, running from the lighting board to the actual dimmers.

Phase dimming (a.k.a. SCR dimming) is a very common inexpensive dimming technology that can make a nasty buzz in audio line, unless the audio installation is very clean. There are two types, forward and reverse. Typically reverse phase dimming is used with fluorescents, but you should check the manufacturer's datasheet for you lamps.

Here's a great little article about dimming fluorescents:
http://www.etcconnect.com/Community/wikis/products/fluorescent-dimming.aspx
 
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