NY wrote
ARW wrote

Swapping 1000W HQI fittings for 240W LEDs.

And any chance it could mess up any filming due to strobe effects?

Quite possibly. Philips Hue bulbs seem to be remarkably constant,

No they are not. Wag your finger past the
bulb and you can see the classic strobe finger.

and I have a desk lamp with several banks of LEDs which is fine
except on the very dimmest setting when I imagine there is no
overlap between one bank and another. Not that I use them for
filming, but being curious, I investigated with my mobile phone,
my compact camera and my SLR camera, each on video setting.

A lot depends on the shutter speed that that camera uses for each frame.
Proper camcorders tend to default to the maximum exposure time (1/25
second) which gives smoother motion at the expense of blurred movement.
GoPro type cameras tend to use the shortest shutter speed that the light
level will allow, to give sharp frames in case you want to analyse frame
by frame, but this leads to disturbing artefacts on motion - eg aircraft
propellers that have disembodied blades. A short shutter speed is
more likely to give venetian blind type flickering with LEDs.

Unlikely most surveillance cameras use a high frame rate.