Go for it, they'll fantastic for the purpose, only alteration I would make if I were you is not to make the reflectors so big coming forward, I was using long tube energy savers at first and was guessing the sizes. Then switched to normal halogens so I could fit a dimmer. At the moment they are quite heavy, I did fit an L shape bracket to try and shift some of the weight towards the back but still, you can not tilt the light head too far forward but in fairness there is not much need to.
If anyone wants any pointers or a clearer idea how I built mine just give us a shout
I'll be using salad bowls as the reflectors, easier imo.