Last night two hours before sunset I was shooting a paraglider pilot and my exposures were a little off. Here is the scene; I am at the base of a 700 foot hill looking up at 35 degrees to the top of the hill. Sky is clear and the sun is 90 degrees to my left. the hill is really green and vegetated but the sky is clear and blue. I have a circ-pol filter on and waiting for the glider to come over the hill. I want to test the exposure before he comes over because when he moves, my camera is metering this glider against a bright sky. I tried metering the top of the hill where he was going to come over to get a reference, but when he came over, my camera showed he was underexposed, so i stopped up (open). I was already at my limit as it was (Tamron 70-300ld zoom, fuji 800, and exposure was reading 6.7, 1/350). problem is, when I got them developed they were Overexposed as opposed to under (they were bright and grainy). What went wrong? should i be reading exposure off the pilot when I can get it or can I start by metering the hill? Sorry this is long but you need to understand the situation. I expected this to be easy as cake.
the same considerations that you give for other types of portraits are the same as for boudoir. how are you planning to direct the light of the table lamps? you will probably find that making up some kind of relfector to improve the efficiency of the lamps is in order, use fast film, and don't over cook the subject with those lamps. there are some who may disagree, but design and lighting factors are the same for any graphic representation, regardless of subject.
Ronk is right the principles are the same as "normal" portraits, the only difference is the setting. The two table lights will be enough light is the film is fast enough and the shutterspeed is slow enough. You're going to need a tripod and cable release. Expect shutterspeeds of at least 1.3 seconds or slower. You may want to use at least one hotlight. It can low ppower and shourd be diffused, but it will help to add a little bit of light.