I got rather excited this morning when the two power l.e.d's I ordered to test arrived. They are luxeon rebel stars and you can buy them from this site: L.e.d 1 (who are great! excellent customer service & super fast free delivery!) they were about £6.99 each, and you have to use a 650ma constant current source to step down the flow of electricity from the mains, they also have to be heatsinked really well (sticking them on a piece of metal) otherwise they will overheat and die!
This is the Cool white 6500k 130 lumen through 3mm opal acrylic
This is the warm white 2500k 122 lumen through 3mm opal acrylic
I am amazed at how bright they are....I don't think these were around last year when I was buying power l.e.ds for air pendant light. I bought the best ones I could at the time and the warm white was only 75 lumens for 1 watt power and these are 122 lumens for approx 1.2 watts (if my calculations are correct) just shows how quickly l.e.d's are developing.