Don't forget about the Phragmepediums, and the mexipedium. There is one more, but the name escapes me now. Those are alos lady slippers. There is only one Mexipedium, and its a mini little thing. The molted leaf Paph you described I have been told does good in paph light, and in fact when I went to one of the growers GH in my OS his GH was dark compaired to mine. I grow things bright with alot more light than most people. The guys GH I visited had 25 and 55 % shade cloth along with shade paint on the back half of his GH. I wouldn't recomend that low. I hear Paphs and other slippers are sensative to mineral buildup in the pots, but are not as bad as CPs in that they need the fertilizer. They are accualy a terestrial orchid, but don't go planting them in dirt you will kill them. They like to stay moist, but also like an open mix. Phrags can sit in a tray of water and be fine, but not paphs. I would say just to be on the safe side do not let it get colder than 55 degrees F. Thats a general rule of thumb for alot of orchids in cultivation, UNLESS you know it to be a cool growing type. There are some of those kinds in the paph species, but if you bought it at a store that puts a plastic bag around the baby then its almost safe to say that it will be fine as long as it doesn't go below 55. You do know that your Phal needs to be chilled down to 55 to get it to spike in the winter right? I am not sure what causes a paph to spike, but I have one I got from lowes that is in flower now after being stuborn for me. They DO NOT like to dry out completely, and will suffer if they do. Unlike many other orchids that like to dry out before watering. Remember Paphs are technicaly a terestrial and occasionaly a lithophyte with some species. There are ALOT of slipperheads over at the orchid source forum.
Once you get more comfortable growing slippers and don;t mind spending 30 to 40 bucks for a seedling you need to get ahold of a Paph rothchildianum. Its not a beginer paph by no means, and can take ALOT of time to get it blooming size. We are talking 7 years from starting the seeds till first bloom in most cases and thats grown in ideal conditions. Its just that this is the granddaddy of all paphs and a really large flower. Oh Its also a multi floral paph too not a sequential or solor flowerer. It also take more light than the molted leaf one too.