Advantages: Lots of light. Efficient use (wattage is less than a 100w bulb), lasts long (I have 3 of these that lasted almost 2 years and still work) Cons: The bulb is HUGE. Ideal for matching socket. They match the Ikea floor lamps (where I use mine) but be careful not to move the lamp too much. Overall: Provides excellent lighting. Maybe a little heavy for small spaces, but I still like lots of light :-) Definitely 4.5 or even 5 out of 5 :D :)
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