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Retrofit LED 5ft tubes in existing fittings query.
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<blockquote data-quote="Geoff1946" data-source="post: 474718" data-attributes="member: 28452"><p>If there is any saving it can only be by power factor correction.</p><p></p><p>The current through the ballast is much less than its original design level, but there will still be some iron losses, and some minor volt drop across it.</p><p></p><p>On the other hand the LED tube probably has capacitive ballasting, so <u>perhaps</u> by leaving the ballast in, (now a series L/C circuit), its better than not having the inductance in circuit from a power factor point of view?</p><p></p><p>In practice I suspect the main purpose of leaving the ballast in is just to simplify the installation process.</p><p></p><p>The instructions for converting electronic ballast fittings indicate that the tube can take full mains voltage, so the ballast is definitely redundant from that aspect.</p></blockquote><p></p>
[QUOTE="Geoff1946, post: 474718, member: 28452"] If there is any saving it can only be by power factor correction. The current through the ballast is much less than its original design level, but there will still be some iron losses, and some minor volt drop across it. On the other hand the LED tube probably has capacitive ballasting, so [U]perhaps[/U] by leaving the ballast in, (now a series L/C circuit), its better than not having the inductance in circuit from a power factor point of view? In practice I suspect the main purpose of leaving the ballast in is just to simplify the installation process. The instructions for converting electronic ballast fittings indicate that the tube can take full mains voltage, so the ballast is definitely redundant from that aspect. [/QUOTE]
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Retrofit LED 5ft tubes in existing fittings query.
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