I can believe it.If you were to look into cold cathode neon lighting, you'd find a large number of products made for domestic/hospitality interior lighting which work at a little under 1000V. I've always assumed that's to get it to qualify as LV, instead of the HV normally used by neon signs.
However, that doesn't alter what EFLI said. To arbitrarily categorise voltages is really not very helpful - one needs to know the actual voltage (or range of voltages) concerned. It is crucial to know whether something is designed for, say, 220-240V or "just under 1000V", just as it is essential to know whether something BS7671 would call 'ELV' is designed for 6, 12, 24 or 48V.
Kind Regards, John