Pros: I just got these Hangsan bulbs so not much experience with them yet. The original 2 halogen bulbs (60W each) in the lamp gave off a lot of heat - in good light - which was uncomfortable. First I replaced them with 2 (4W) LED bulbs but - as my wife works a lot with needles - the light wasn't enough. The new Hangsan 6W replacement bulbs have a perfect light color and high intensity (comparable to 60W). At first I was worried they wouldn't fit as they are a bit longer than the original halogen bulbs but I found another review that did the job just as well and it turned out the bulb fits perfectly existing G9 lightweight base. I am convinced that these LED lamps are much more energy efficient than the old conventional halogen lamps. Like I said regular halogen bulbs were hot, these LED bulbs are tons hot. Cons: Can't think of any right now. Time will tell, but so far I'm happy with these Hangsan LED bulbs.
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