[troypiggo (Troy)]

Been talking to some guys about this by email, but think I'll cast it to the wider audience.

I bought one of those A4 panels from elec2go.com.au to use as a lightbox for flats. I got the 12V version.

I pretty much just mount it flat against the end of the dewshield hood on my ED80. Tried it up at Leyburn the other week running it off car battery and it worked a treat. I was really happy. Refer the first attached image.

Got back home and doing some more testing running it through a 13.8V regulated power supply off mains power. Now my flats are getting banding in them. Like the panel isn't creating even light at the same instant. Refer the second attached image.

I thought the cause might have been the shutter speed on my camera being close or syncing to the speed of the panel creating the light. Tried changing shutter speeds a bit but can't seem to prevent this banding.

Talking to another IIS member, they said it may have something to do with the reg power supply running at 50Hz causing it. Not sure of the details behind it, I had assumed the "regulated" ensured a pretty smooth output?

Could this be it? Are you aware of some way of evening out this output to stop it?

I know one solution would be to build a proper box, get the panel further away from the end of the hood and use some sort of diffusion material. But I like the way I have it because it packs nice and flat, not bulky.