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<blockquote data-quote="The Godfather" data-source="post: 75704" data-attributes="member: 218"><p>1 Constant voltage LEDS are fitted with current limiting resistors, constant current LEDS rely on the supply to limit the current.</p><p></p><p><strong>2 LEDS can be selected for Illumination Intensity matching at a given current.</strong></p><p></p><p><em>Parallel LEDs must have closely matched forward voltages (Vf) in order to have equal branch currents and, therefore, equal light output. Variations in the manufacturing process can make it difficult to obtain satisfactory operation when connecting some types of LEDs in parallel</em></p><p></p><p>The Godfather</p></blockquote><p></p>
[QUOTE="The Godfather, post: 75704, member: 218"] 1 Constant voltage LEDS are fitted with current limiting resistors, constant current LEDS rely on the supply to limit the current. [B]2 LEDS can be selected for Illumination Intensity matching at a given current.[/B] [I]Parallel LEDs must have closely matched forward voltages (Vf) in order to have equal branch currents and, therefore, equal light output. Variations in the manufacturing process can make it difficult to obtain satisfactory operation when connecting some types of LEDs in parallel[/I] The Godfather [/QUOTE]
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