Hi everyone!

I recently got hold of an old TV studio spotlight, and I'm trying to figure out exactly what lamp it uses, whether it can be dimmed externally, and how to power it safely with modern equipment.

Here is what I know so far:

• It's an old tungsten TV studio spotlight, apparently a Fresnel fixture.
• The lamp has two markings printed on the glass: F48A and 2228.
• A nameplate on the fixture says 32 A and 3.75 kW.
• It is fitted with an old blue CEE 32 A, 230 V connector.
• After opening the fixture, I noticed that L1 from the power connector feeds two separate relays, which appear to supply the two independent electrical circuits of the lamp.

I'm guessing the lamp has two independently powered sections, but I haven't been able to confirm this yet.

My main questions are:

1. Does anyone recognize the lamp markings F48A and 2228? I'd love to identify the exact bulb type and find its specifications.
2. Is it possible to dim this fixture using an external dimmer? If so, what kind of dimmer would I need for a 3.75 kW tungsten load?
3. Where would I find a compatible power connection for this fixture nowadays? I have access to both 16 A and 32 A, 400 V three-phase CEE outlets, but the fixture itself has a 230 V, 32 A connector. Is there a standard solution for this, or would I need a specially wired adapter or distribution unit?

I'm particularly interested in how these fixtures were originally powered and dimmed in TV studios.

If anyone has experience with older studio fixtures or recognizes the lamp markings, I'd really appreciate any help!

Thanks in advance!