A lot of the reviews for this lamp (bulb) are unfairly giving it a poor review: it says how large it is right in the description, it says how bright it is in the description, it says its lumens and color temperature right in the description, so don't give it a 1-star review for not reading the description.Anyways, the bulb works, plug it into any socket that's rated 60watts or higher, and you now have a 150-watt equivalent. I will agree with others that this is a huge bulb, most fixtures it will not fit in, so make sure you take the time to measure correctly. For my intended application I was putting it in our living room, which only has a floor fixture; after installation, it was about 1/2in too tall and you could see it over the glass bowl, but that wasn't the real problem. It really was just too bright, and I wound up bringing out a second light fixture and having 2 100-watt equivalent bulbs instead, nicely balances out the room.The color temperature is for the most part what I was looking for, 2700K, which is the incandescent equivalent, so common for "relaxed" rooms (living rooms, bedrooms, etc). Trust me, you don't want to get a cool-white (commonly 3400K-5000K) or daylight (5000K-6500K) unless you really know you want a blue/green-ish hue in a stark-contrast room (workshops, offices, and plant growers should know their respective light spectrums). This bulb has a fairly poor spectrum rendering, you can tell its not quite the same range as an incandescent (CRI -Color Rendering Index- not being all that helpful to begin with, but everyone has a very slight orange-green hue with this bulb); it's perfectly fine for home-use, just relevant for video/photography or people who are really picky.The only reason for knocking off a star is the bulb takes quite a long-time to reach its full-brightness, a couple of minutes or so. We are used to it since we've had old CFLs for a while now, but it would be nice to have it heat up a little quicker. At start, this would be more around a 75-watt equivalent, eventually heating up to around a 150-watt equivalent.Another reviewer noted the insert says to keep the bulb "base up", but I wouldn't take that recommendation too seriously. We've hung it in a few different ways, we have others similar to this bulb (100 watts) that we've hung rightside-up, sideways, and upside-down, no problems and they've all lasted a few years at this point. The only recommendation I would have is to make sure there's some cooling around it, not that I think it should be too problematic, but I'm sure it needs more cooling than a standard 60-watt equivalent.All in all, a good bright bulb, does what its supposed to, just takes a little while to reach its full light potential.
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