I just received a couple more LED bulbs for the rest of my basement(decided to replace every bulb down there so I'm not walking from white light to yellow light)
these guys are really bright, easily replaced the 60w traditional bulbs I had in before, in fact I'd say they're pretty much on par with 100w ones. they are dimmable, but dim to 'off' much sooner. my dimmer switch is basically off from about 0-20% and then it dims normally for the rest. the bulbs are VERY heavy though.
pleasantly surprised by these guys as well, they are definitely brighter than the 50w halogens they replaced. light dispersion was also very good. I have 3 of them connected to a lutron ir dimmer(something that often has issues with LED bulbs) and it appears having at least three of these connected is JUST enough load to make the switch function. with only 2 connected, they won't turn off. but with 3, they function normally, except the odd hiccup when dimmed very low before/after turning on. if I dim to the lowest setting, then turn them off, one bulb often stays on. if I turn them off from a brighter setting, no issue. and the opposite happens when turning on. if I turn them on to just a very low level, sometimes one or two of the bulbs does not come on. if I go to a brighter level, no problems. I'm guessing with 4 or more connected, this wouldn't happen at all.
again, like the other led's I've tried, they dim well, but not as low before turning off. if you want a VERY low level of light, they aren't good. at the lowest settings they are still fairly bright(think full moon bright).
the other thing, both of the new ones I ordered are 4200K which I think is PERFECT. the first batch I ordered were a little vague on actually color temp, but they must be in the 5000-6000k range, as they are slightly whiter. the 4200k looks very close to sunlight, but still looks 'right' inside. my wood doors, and tan paint in my bedroom still have a warm look to them with the 4200k bulbs. this will definitely be the color temp I aim for from here on out.
still have three more bulbs in the mail to try out, then i'll have my whole basement converted: http://www.amazon.ca/gp/product/B007B6LOM4/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1