George,
Thanks for your interest in the Nespa units. First once a CD is treated with either the Nespa #1 or Nespa Pro units, it is permanent. As for how long do they last before the bulb burns out? Japan can't even tell me this but so far, with over 50 units sold, only one has burned out and that was my own unit. I used it on hundreds of CD's then sent it to Bill Gaw of ETM for review, who had it for several weeks and did MANY cd's himself, many more than I had already done. From Bill it travelled with me to CES and then it was given to Clark Johnsen of PF to travel with throughout CA. In Clark's travels the light stopped working.
Japan's policy is to have me ship the units back and they replace the units with a brand new unit, no charge, to the customer, just the customer will pay the postage to return the unit to SOS and pay for having a unit shipped back to them, a very small fee.
We now have 4 dealers and more are coming on board. Please feel free to contact Sounds Of Silence for your local dealer.
Steve
SOS
PS: We are currently over 50 units in back-orders.