Rated 3 out of 5 by 1
Rated 3 out of 5 by DNeuwir Decent color quality for CFL, but terribly slow to warm up.
I've now had 8 of these 4100K bulbs in overhead canister lighting in our kitchen for about a year. At full brightness they produce a very "white" light with just a hint of yellow, and lacking the bluish tint present in 5100K bulbs.
One thing I definitely hate is that, even from first use, they take an incredibly long time to warm up to full brightness. When first powered on, they illuminate to perhaps 20%, and slowly ramp up to 100% brightness over almost 5 minutes.
We typically have an on/off cycle of perhaps 4 hours use per day. One has already burned out after about 1 year of use, which is about what we were getting from prior halogens, making these bulbs very expensive when adding purchase cost in to the total dollar value.
In all, these lights are "okay". I'd probably be rating them higher if they lasted longer than 2000 hours.
March 8, 2013