Silent trailing edge dimmer/bulb compatibility

[whisky-dave]

and how much is a theatre dimmer compaired to a dimmer you'd use in the home ? I know theatre have curtain closing too but you don't ofent see them in the average home.

[charles]

The lights have their own built in dimmer

but you can buy them - with dawn/dusk sensors too.

[Dave Plowman (News)]

Leaves plenty to dim it from an on state.

No shit, Sherlock?

Eh?

Are you wanting to discuss dimming a low voltage DC driven LED or one on AC mains?

[Dave Plowman (News)]

The pro dimmers used on portable film LED lighting I've seen are PWM. This allows a good fade up and fade down. But then they didn't used LEDs designed as a replacement for ordinary tungsten mains lamps.

[whisky-dave]

exactly thats why they start dimming from an on state rarther than an off state like leading edge dimmers do.

Apparenty although the last time I was at a theartre they were using rhosstates for dimming lights 25+ years ago so I think they were just in series with the mains.

yeah Eh dimming using a trailing edge is more difficult/expensive than a leading edge.

Both. Why not.

[charles]

Rheostats (in series with the mains) ceased being mainstream for theatre use around 60 years ago. I certainly met a remote controlled lighting system in 1959.

[tabbypurr]

God you talk some rubbish.

[whisky-dave]

There's many ways to dim an LED some work better than others.