On 2008-09-08, The Natural Philosopher wrote:

Adam Funk wrote:
I have a couple of Ikea, wall- and ceiling-mounted, fluorescent
lights, each of which has a curved, thin plywood cover with a lot of
slots in it, lined by a sheet of diffusing white plastic. The lights
are good except that after a few years the plastic linings are
deteriorating and falling apart.

Thats Ikea for you..

Can anyone recommend a type or source of flexible plastic suitable for
replacing them?

Not that wont suffer the same fate.

Replace with something that is fit for purpose.

That's what I'm interested in doing --- replacing the deteriorated
plastic. The lights are otherwise in very good condition.