I purchased some in 4100k to try out.
I then returned them.
Despite being a "32watt replacement" they felt about half as bright.
also I prefer the 3500k color temp in the kitchen.
These might be good in a laundry room-frequent on/off
or garage where t8's dont like to fire up at 0F
otherwise.. too dim for me.
My 4 bulb fixture has 4 bulbs for a reason If I want it half as bright I'll just put 2 bulbs in it.
Its my main cooking light overhead by stove and sink. I use it around 1 hour per day.
link
http://www.homedepot.com/p/Philips-4-ft-T8-17-Watt-Cool-White-Linear-LED-Light-Bulb-456590/206278131
They do require electronic ballast..
They wont work as direct wire.. or with magnetic ballast.. although they do work in t12 fixtures if you have a decent electronic ballast.
They might have their place.. just not in my home.
If they made these about 25-50% brighter in 3000k or 3500k color temp they would be ideal replacements IMO.
I would try in the garage but I dont really want less light. They probably would be better in the cold part of winter but I use the t8 lights in the garage ...maybe a few hours a month.. so kind of pointless.
I also have a 2/3rd's of a t8 4100k 12 pack in the basement.. they were 12 for 15$ or 2 for 7$ last time I needed 4 bulbs.