You already know I'm nuts. Gone and done something really weird again...

I made an LED lamp with a light sensor controlled entirely by valves. Well the circuit anyway, still need to solder it up, connect the transformer, and add a case of some sort. There are no transistors, the LEDs are driven directly by a valve, everything runs on 12V. It took me a very long time to figure out how to get the tubes to turn off in space-charge mode. (the circuit still acts up a bit, I'll have to see how it behaves once assembled) I originally intended it to be a night-light, but it's a bit bright unless I use a diffuser of some sort.
Do you think that little transformer (on top of PSU) will be able to handle 300mA continuous (500mA startup surge) without getting hot?
Parts List (minus power supply, any 12V power supply capable of at least 350ma will work):
12AT7 (or 12AU7 or 12AV7)
12BA6
7427 LDR tube (any LDR sensor will work but you might have to add some bias, you could also use other sensors or triggering devices)
three 4.5v (20mA?) ultra-bright white LEDs (IDK what the max current output of this device is)
1K 1/2W resistor
LED current limit resistor (optional, depends on your LEDs and how hard you drive the input)
500K Potentiometer (switch ganged or seperate)
Trimmer Potentiometer (optional, to inrease max brightness/sesitivity)
Tube sockets
Tube shield for 7-pin socket (12BA6 must be sheilded for thermal stability)
You could use different LEDs with a different current resistor. Just keep in mind that space-charged electron tubes don't play around, they are totally capable of blowing up your LEDs (mine luckily survived 50mA through the tube with a 10ohm resistor).
I'll draw up a schematic some time or other (probably in MS paint

). I also note that the tubes respond to touching the wiring, so my next project could be a tube touch lamp.