Hi Nina, congrats on your new business!
As for your mag lamp question, Universal Companies sells some small brackets, I believe they are about $22, that you can bolt to a wall, a rolling cart, or a sink cabinet. If you don't have a wooden rolling cart, consider buying 2 brackets and bolting one to the wall (be sure to find a stud) and the other to your sink cabinet, so that you have maximum flexibility in positioning the lamp (the lamp is very easy to move from one bracket to the other - just make sure not to pinch your fingers in the lamp arm)!
As for the pH testing of the skin, I do have that pH pencil but had always just used it to test people's products by applying to clear glass or white ceramic. What I have heard about testing the skin's pH is that it is not a reliable measure, as that number fluctuates throughout the day. I will try it out when I get to my studio, for sure. I would imagine that to get the most accurate results, you'd want to dampen the tip of the pencil instead of the skin, to make sure you aren't diluting the acid mantle on the skin with water, and be sure to test over dirty skin (aka, whatever is on their skin when they walk in the door). If you test after cleansing, skin will always appear too alkaline, and if you cleanse after toning, it will always appear acidic.
interesting on the pH pencil-had not heard of or seen it. Now I'm curious.
Can't help you on the other question. My mag. light/steamer was purchased that way. I hate the amount of space the base it takes up, likely a safety feature so it won't tip over as easy.