Is specialized equipment needed for practicing Phosphenism?
For testing purposes and producing a few phosphenes, a common white light bulb set in a lamp without a shade or a desk lamp will do the job. But as soon as you want to switch to sustained practice, it is better to use specialized equipment. Thus, not only will the phosphene be more exploitable, but you will also avoid any eyestrain, even during long periods of practice, like students in pre-exam periods who do a great number of phosphenes over periods of 8 to 9 hours. Certain architect lamps can also be used but, in this case, you should use the phosphenic light bulb (ref: A08), a photo-enlarging type, which can be purchased from a specialized photography shop or from Phosphenism Publishing. This type of bulb emits light in a perfectly homogeneous way, and produces a very bright phosphene.
