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Old 05-18-2007, 09:21 AM   #6 (permalink)
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Default Re: Help! Sudden Melting/burning Endcaps

This is what a poster in the other planted tank forum suggested just now:

"It's not a ballast/bulb combo problem and cooling fans won't stop it. The problem is the contacts in the endcap are loose. This causes a bad electrical connection, which makes for a high resistance and it sometimes arcs and always gets hot. You may be able to "squeeze" the female connectors in the endcaps a little with pliers to tighten them up. It's a common problem on molded endcaps for a lot of types of lighting."

Either it's a loose connection and/or corrosion in the end caps. Both explanations are highly likely.
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