Ok I finally got some time to sort this. I ditched the bulbs I had as they obviously had some sort of regulator or other electronics that was inhibiting PWM control.
I knew that with the strips working, and LEDs being DC in their raw form, this had to work if I found MR16 globes with no additional electronics.
Problem when searching is most say AC/DC and either dimmable or not. But are they AC/DC because they have a regulator? Are they dimmable because we can send PWM, or because they have voltage controlled PWM built in?
Only way to find out was to order a heap of different types and see. Luckily I figured cheapest was probably best in this situation as they're likely to not have extra stuff and they're only $2 each from china!
Out of all the types that I received, only one worked, but they work a treat! A nice diffuse warm white, PWM dimming works perfects; and I can feel no heat from the globe after being on for an hour.
These are the ones you want.
Not too bright at 3W, but it means I can run a heap of them from low gauge wire and have dimming control for each bulb.
Right now I have 8 of them running over 2 cat5e cables.
Plenty of light with all of them on, super low power consumption, and individual dimming control of each bulb via arduino.
$2.37 * 8 = $18.96 for bulbs
$5 roll of ethernet cable from seconds yard
$8 arduino clone
$5 11x FQP30N06L MOSFET.
$4 Ethernet LAN Network Module
$20 10A 12VDC supply.
$60.96 AU for fully automatable light with max total 24W consumption. Super easy and tidy cabling and no dangerous mains to deal with. I'm calling it a win!
The first 8 mosfets are for the white bulbs, the last 3 for RGB channels for the strip that i'll hook up aswell.
I need to upgrade to a Mega or use softPWM to get enough PWM pins to put everything online.
Controllable via custom OSX app over USB right now but working on the ethernet control for web server control + custom iPhone app.