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HF ballasts for linear fluorescents
Got a fitting with a pair of T8 58W tubes that sometimes take a while
to start. I've had enough of swapping starters with variable results, and the ends of the tubes go black too soon for my liking. I took the cover off this evening to see what's inside: http://i29.tinypic.com/2ikfvgz.jpg The 'crack' in the tube at the top is a cobweb in case you were wondering. It was full of dust. I've also read http://wiki.diyfaq.org.uk/index.php?...scent_Lighting (thanks to those who contribute to this!) I assume that what I currently have is EEI (Energy Efficiency Index) D since the fitting was fitted in the early 90s (could have been made earlier) and not marked with such information. With an electronic HF ballast, the power saving would be a bonus to increasing lamp life, better starting and ditching the nasty starters. I've seen ebay item 250670139376 with an A2 EEI rating which drives both tubes (I know that if one dies, they both go out until the dead one is replaced). On the label, Philips recommend using short cable lengths to one end of the tubes. What is the reason for this? I assume something to do with 30kHz. How short is short? Anything else I should watch out for apart from isolating the fitting, double checking work, etc? PT |
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