musht Posted October 31, 2007 Share Posted October 31, 2007 Lower price on Varilight product and a GU10 dimmable: http://www.tlc-direct.co.uk/Main_Index/Lig..._CFL/index.html Megaman list a PAR38 CFL dimmable in press releases as well, GU10 only goes as low as 10% Link to comment Share on other sites More sharing options...
Andrew C Posted January 8, 2008 Share Posted January 8, 2008 OK, so we're a few months on, and I've bought 6 of these and tried them in the house-lights, run off a JTM rack. Verdict:- NFG. They don't dim right out, and snap on quite bright when the incandescents are still quite dim (circa 15-20% on the fader) Would be fine in a room where they are set to the desired brightness and left, such as a lounge. A bit cold for my liking. Additionally. one has already turned up its toes. Shame - nice idea. Link to comment Share on other sites More sharing options...
matt_beal Posted January 8, 2008 Share Posted January 8, 2008 snap on quite bright when the incandescents are still quite dim (circa 15-20% on the fader) Out of interest, is there any chance of getting a decent curve out of them by altering the fade profiles on the desk? Link to comment Share on other sites More sharing options...
Andrew C Posted January 8, 2008 Share Posted January 8, 2008 Out of interest, is there any chance of getting a decent curve out of them by altering the fade profiles on the desk?No, I don't think so. However slowly you bring them up, they still snap on. Link to comment Share on other sites More sharing options...
Tomo Posted January 8, 2008 Share Posted January 8, 2008 However slowly you bring them up, they still snap on.This is a fundamental flaw of every single 2-wire dimmable fluorescent I have ever seen. There simply isn't enough power available at the low end of an SCR dimmer, so they always jump at around 20%. 3-wire and four-wire dimmable florries do better, as they have a constant power supply for the heater coils. Link to comment Share on other sites More sharing options...
musht Posted January 8, 2008 Share Posted January 8, 2008 Its an effect known as hysterisis or backlash, had hoped they had managed to get round the problem. No luck with giving them a bit of time to start as mentioned above? >>>At minimum they take a second or two to start<<< Link to comment Share on other sites More sharing options...
Andrew C Posted January 8, 2008 Share Posted January 8, 2008 >>>At minimum they take a second or two to start<<<Even on a 20sec fade they still snap on then fade to 100%. I was aware of the potential problems when I bought them, but I was hoping they'd progressed with development far enough for it to be acceptable. Link to comment Share on other sites More sharing options...
stagemanagement Posted February 4, 2009 Share Posted February 4, 2009 Well, we've just had new house lights designed, built and installed with compact flourescent fittings - at a huge cost to the venue and........ .....they are totally useless! They do not dim below 3% - the lowest that any compact flourescent can dim according to manufacturer! When going from (the alleged!) 3% to zero, it's a big clunk off like a factory warehouse! They are very cold (even the alleged "warm" version) and the auditorium now looks like an operating theatre and not a theatrical one! I would advise anyone to resist installation of compact flourescent lighting in their auditoriums at ALL costs, get the tungtsen-halogen fittings that CAN dim instead! Or simply reduce the number of tungsten fittings in use - THAT is energy saving as well!! Link to comment Share on other sites More sharing options...
tokm Posted February 4, 2009 Share Posted February 4, 2009 Well, we've just had new house lights designed, built and installed with compact flourescent fittings - at a huge cost to the venue and........ .....they are totally useless!What do you expect... you say yourself your working for a council venue. Wouldn't have expected them to listen to anyone other than they're 'specialist' :P. Im sure you've raised these issue's with them and of course you must be wrong and they're definitely 'fit for purpose' because 'everyone else' uses them. How you got round the problem then? Just rigged up some floods and used the new house lights as workers? You have my condolences.. T Link to comment Share on other sites More sharing options...
jonathanhill Posted February 4, 2009 Share Posted February 4, 2009 I loathe fluorescent lighting when it is used for anything other than general lighting. Mainly because the colour temperature (so to speak) is all over the shop and comes with a lovely green cast. Not. I would resist all attempts to use dimmable fluorescents in any venue I was running because the light they produce is just plain wrong. Link to comment Share on other sites More sharing options...
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