Brian H,
I hope you don't mind if I chime in here, but in the "small world" category, I just bought a couple EarthLED DirectLED FL T5 4 foot tubes (with fixture).
I chose cool white color. 6000K; 900 Lumens (or so they claim).
Universal Power 85 to 265 Volts AC. 50-60 cycle. 13 Watts Max. Typical 12 Watts.
No fan.
Not for dimmer circuits and modules.
I agree that the light output may not be as bright as rated on their site, but it is quite bright.
I have only tested it in a appliance module.
I don't have any serious test equipment for line noise and such, but they have had no noticable effect on my X10 reception.
Where I have them mounted they actually shine up toward the peak of my vaulted ceiling (white) from about 4 feet down. A single one lights the livingroom, diningroom and kitchen well enough to see and even read by. Both lit is like a bright sunny day!
You're right, the cost is steep but I love only pulling 12 Watts for my normal nightime illumination. Even my CFL (60 Watt equivalent) pulled 25 Watts!
Oh! In case anyone is interested in them, here's a link:
http://www.earthled.com/DirectLED-t5-led-tube-replacement.html