On 06/06/2010, Bruce Walker <[email protected]> wrote: > Out of phase issues with the CFLs: hmmm, I hadn't heard anything about that, > but it certainly sounds like a valid concern. I'd imagine that would vary > widely by CFL make and the amount of coating used in the tube. > > Re LED stage lights: yes! I've had annoying problems with those myself. But > the ones that cause the big problems are the LED spots comprised of > alternating red, green and blue LED lamps that can be mixed by the > controller board to produce arbitrary colours. > > The new LED arrays that are sold for video shooting use uniform matched > "white" LEDs and are apparently very close to traditional Flash WB.
CFLs with integrated ballasts/electronics generally run at a higher frequency then the mains so that's generally not a problem. And from experience I would expect that cylindrical fluorescent tubes designed for photo-lights would likely be designed to exhibit persistence that negates the pulsing (as I haven't experienced it). Our ABC TV is state funded and generally has the best gear that's about, currently they run arrays of 2' tubes with LED as highlights for 1:1 interviews, colour balance is excellent and integrates perfectly with outside lighting. The wide shots below were shot using AWB on the *ist D and the portrait was shot using the K20D with a manual WB: http://picasaweb.google.com.au/distudio/Lighting?authkey=Gv1sRgCLzWi5ypt_r39QE# -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
