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/news/12030-apollo-announces-new-clip-light.html, http://www.controlbooth.com/forums/lighting/7630-backstage-lighting-temp-permanent.html.
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/news/12030-apollo-announces-new-clip-light.html, http://www.controlbooth.com/forums/lighting/7630-backstage-lighting-temp-permanent.html.