We have just installed suspended wire lighting in the kitchen. The ceiling is really too high to attach anything to the beams, so using a suspended wire system seemed like the obvious choice.
There are 2 pairs of wires – one along the line of the kitchen work surfaces, the other over the breakfast bar. There are 4 lights on each. These are 12v LED lights. Each are 4.2W. So we have about 17W of lighting on each pair of wires.
The cables are fixed to the wall using some oak mounting plaques that the joiner made. The oak was left over from building the roof, so once these pieces of oak have been treated with Osmo, they will match the rest of the oak in the kitchen.
The suspended cable system is from SLV. You will find the lamp holders here: http://www.slvlightingdirect.com/track-lighting/wire-12v-lighting-system/slv-181080-lamp-holder-adjustable-wire-12v-system-light-black.html.