Generic term used for theatrical work lights with clamps on the end of them often gelled blue and used as task lights back stage. Some call them "Equity lights" ( as a certain level of backstage illumination is required by AEA for actors' safety) or "running lights."
Apollo has taken the design and refined it to a new level, specifically for live entertainment use.
http://www.internetapollo.com/Products/View/3231.aspx
For discussion, see these threads:
http://www.controlbooth.com/forums/n...lip-light.html,
http://www.controlbooth.com/forums/l...permanent.html.