I want to install these in my new house, but I have 9' and 10' ceilings and have been told they don't supply enough light. Let me know if you have tried it and how it works. I want the CR6 because of price and 5% dimmable feature.
That is not true, though I understand how one can arrive at that conclusion.
1. A standard A lamp has ~ 800+ lumens output.
2. Placing an A-lamp in a recessed can meant for reflector lamps results in a significant amount of light trapped within the can.
3. Recessed cans with reflector lamps produce a spot light effect.
A CR6 has a rated output of 575 lumens which on paper is less than 800+ lumens (A-lamp). However, the positioning of the led emitters results in more light delivered into the room than an A -lamp in a recessed can (as described above).
Although I don't have such high ceilings or CR6, my experience with the Cree LR6 and Sylvania RT6 has been that they outperform the standard recessed can outfitted with 15W - 25W CFL bulbs.
I've attached a link to an online article about recessed can lighting.
Here is a link that might be useful: Comments on recessed lighting
I've used them in 9' ceilings and they were bright enough.
I've seen 10' ceilings with 65w incandescent R30 floods (which are about the same brightness and beam spread) and they sufficed. You may need to space them slightly closer together than if you used high-wattage PAR38 (the larger siaze) halogen downlights, but only slightly.