Hi, I have to oak beams that run the length of the house in my loft, I am looking to have some hidden down lights behind both beams (3 behind one long beam & two behind the other beam because the entrance is in the middle). I was thinking of putting 5 spotlights 50 watt each on mains 240volt, this would have a dimmer switch to lower the light level (as its more of a soft light I want). What is the lowest watt bulbs you can have connected to the mains? Would I need a high voltage dimmer switch? and are spot lights Ok to be used on a dimmer?...... The other option would be not to have a dimmer but have a transformer behind each beam and maybe have decking still low voltage lights. I worry about this second option because LED style lights tend to wear out after a few years (like my decking lights have). Any suggestions / advise welcome....