Complete Darkness. I need the my float to be in complete darkness. I cant relax and it is real annoying when there is a little light being leaked in. Each tank has a polyheaster fibrous lining that lets a trace of light through. It can be a light purple color but it is still annoying.
It is just like the tinted windows on cars, you can still see through them sometimes.
NOte: What is realy bad is when I am in pitch dark for several hours and get out of the spa and it is bright as shit out and really hurts my eyes. Its liek getting out of a movie theater on a sunny day and its so bright out you can't even open your eyes. I need some kind of light transition before full spectrum. Make sure your spa has a dimmer switch so you can adjust your eyes before getting out of it.
It is best to keep the spa in a basement where the noise and light are not there and. Many people put them in a room where there is a window near by, just setting their float experience up for failure.
In-Spa Light Fractals
We put these one the lights to raise the vibration of the water. These are the stickers I was talking aout that cost about 55 dollars each. They are a little over the size of quarter. I will send a free sticker to anyone that wants to demo the sticker. I put one of these stickers on my cell phone battery in my phone which emits EMF. It transmutes the emf from my phone to energy that the fractal transmutes. There are thousands of videos showing what these do. The sticker is like DVD that has informational frequencies programed in it. It does nothing wihtout the carrier wave of the body or EMF. You can put it the hematite one under a pizza or a glass of water and it tastes a night and day difference. The water becomes light as air. It make my body feel so great,especially when I am at negative 25 millivolts charge.