My shop is well lit and that's a good thing to a point. When I'm shaping a stock, I constantly will set it up on a shelf about 6' or so high, turn off all the lights and view the architecture using a floor lamp(incandescent bulb) to highlight the lines via the shadows. I mark anything that doesn't look correct and make the adjustments, then repeat. Works particularly well for the transitions from wrist to butt and cheekpiece. I do the same when carving while on the bench, turn off all lights and use a low angle light to check for imperfections.