I believe that the first group of these light bulbs I got were Sylvania, and there was a short delay before they would come on. The GE seems to come on a biy faster. But I have lost nothing by switching!
I replaced about half of our home's bulbs with this, We have a new home and it's amazing how many lightbulbs they manage to put in! You figure, cutting from a 60 watt bulb to a 15 watt, that's a quarter of the power! And I have not noticed missing "light" from our home. Granted they aren't cheap yet but they aren't bad!I think this is a GREAT product!
Before you purchase these bulbs, make sure they're what you're looking for.
As bulbs have been burning, I've been replacing them with CFLs. When I was picking up a four pack of new bulbs a higher quality 'daylight' model seemed like a good idea. Who doesn't want to use more 'sun-like' light whenever possible? Well...when installed them near other rooms with more traditional 'soft' lights installed, it's quite hilarious. People actually made comments like 'is it still daytime in the other room?' and 'do you have a tanning salon in there?' I think if the entire home used this style of light, it'd be great but it doesn't work well when mixed. I'd recommend trying them in a more isolated room/area and see what you think. It might take some adjustment to get used to the type of light.
Besides that, they're great. They're install like any other bulb, run cooler, use a lot less energy and last longer. No one should buy anything but LED and CFLs whenever possible.
I am a grad student, so I don't have many lights in my apartment to begin with. Even so, I bought one, for the lamp I most often use. As they are more expensive than the regular light bulbs, I have only bought one so far. The good thing is that my lamp now runs much cooler than with my previous bulb (which got quite hot). It also turns out that these are very bright. I don't really need another lamp to light up my room they are so bright.
The downside: if I look into the light, I feel "blinded" so to speak. Otherwise, I like what I see.
Had one at home and loved it. Read by it each night.
I bought these at my local hardware store for about $5 a piece which is expensive, but will save you in the long run. CFL's last longer and are more energy efficient than traditional bulbs (which I am sure everyone here already knows). The downside to the enviro is that they contain mercury, so if one breaks you wan to take the proper precautions... you can read about how to clean up broken CFL's on our site at http://greenupgrader.com/714/homedecor/light-bulbs/how-to-clean-up-a-broken-cfl-light-bulb/
As my regular light bulbs burn out, I'm replacing them with these. I like the light that is emitted from them, but I've had some trouble getting them to fit inside light fixtures. They are larger than regular bulbs, so sometimes won't fit right. It's worth the little inconvenience, though, to know that I'm buying a longer-lasting bulb.
I love that these bulbs help the environment however I wish they were brighter!