what drivers do I need for these LED bulbs?before i buy wrong...

I have in my kitchen 4 spot halogen bulb of 50 watts
I have them replaced by this: http://www.fasttech.com/products/2201/10000795/1069110

now blink the lights because the transformers (each per lamp) too old and too heavy I think.

So I need four drivers (+ –230 V to 12 V) or am I better off with a bigger driver for 4x (4x1 whatever) spots?

thx

http://www.benl.ebay.be/itm/6W-12V-Constant-Current-MR16-Light-Eletronic-LED-Driver-Power-Supply-Transformer-/360708029328?pt=AU_Lighting_Fans&hash=item53fbdfbb90

Don’t mess with crappy bulbs. Try these: Shop by Category | eBay

They put out more light than the 50 watt halogens. I have 42 of the 10 watt ones in my house. All are on dimmers, some with only two bulbs on a transformer.

the bulbs are good for me this time but i need new transformers.

I suspect that the Philips bulbs will cost you less than new transformers… plus put out more and higher quality light than those Chinese bulbs. Also, they are a LOT easier to install than new transformers.