Interesting. My problem has to do with physical configuration
Have a spider
lamp in the living room which uses 40W or 60W bulbs about the size of a golf ball which also has candelabra
sockets. No can find anything in the LED arena which will fit.
Bed lamps on the headboard have a standard (?) socket, but needs flame-shaped bulbs in order to lift off the glass mantle for replacement. (Yeah, I know, but even LEDs require replacement after a time - who knows, I might even live that long
Have a couple of desktop LEDs, one (1) clamp-on, one (1) desktop, over two (2) of the compter desks. Adequate for typing, but inadequate for writing deposit slips or checks.
Biggest problem so far, however, is finding a functional chart - yes, I've searched - that equates watts to lumens. I'll get an LED home that I think will work, but the light output is inadequate. Colour balance is part of that problem, yet not the whole problem. The directional issue is something I can deal with, for the most part, considering the nature of my ceiling fixtures (recessed, glassed over), but so far CFLs work reasonably well there.
By and large, my biggest issue with LEDs is equating light output 'tween watts and lumens. Well, that and the fact that I've spent over a couple of hundred dollars experimenting - that's a pretty large expenditure for light source experiments that don't involve a nuclear reactor
Haven't had time yet to check those links, but as soon as we're through with the sailboats (annual maintenance, helping a friend who has a sailing school here), I'll check 'em out.