Flourescent light crashes Scroll Phat HD

@Richard238 wrote:

I’ve put my Pi3B+ in the cupboard under the stairs.
Scroll Phat HD is remote from the Pi, on about a metre or so of wiring.
Scroll Phat HD runs, for a while, until I turn the cupboard light on or off, when Scroll Phat crashes.
Error on terminal shows:

Traceback (most recent call last):
  File "scrolling1.py", line 46, in <module>
    scrollphathd.show()
  File "/usr/lib/python2.7/dist-packages/scrollphathd/is31fl3731.py", line 594, in show
    self.i2c.write_i2c_block_data(self.address, _COLOR_OFFSET + offset, chunk)
IOError: [Errno 121] Remote I/O error


------------------
(program exited with code: 1)
Press return to continue

Runs OK again when .py file is retried.
Pi is on a a standard domestic ring-main circuit, flu-tube is on standard domestic lighting circuit.
Any ideas on why a flourescent light would cause Scroll Phat HD to stop?
Any what can I do to prevent it happening?

Thank you.

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