I use these in outdoor landscape lighting with a 12 volt AC landscape transformer. They match my "backlight" perfectly. You feel cool. All bulbs tested before installation. They all worked. All 26 small LED chips on each bulb worked. They are polarity sensitive! (when tested with a 9 volt battery). The top is the positive end. The bulbs are nice and bright, but they give off a warm glow, not harsh and not yet flickering. They are slightly brighter than a standard #89 #89 6 plug automotive bulb. I just installed them so I don't have any durability results. I will update if anything changes. The lighting works for about 8-10 hours every night. UPDATE: I've had them installed for 7 months and they work like clockwork every night. No flickering or other issues. They work great!
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