Lamp holder with 9-pin socket for Osram spectral lamps. It is fitted with a built-in cooling fan to keep the holder's surface temperature below 60 °C. The centre of the light aperture is placed 147 mm above table height. Light aperture: Ø 25 mm. The rear plate of the lamp holder has a threaded socket for a Ø 10 mm support post.
The lamp holder is fitted with a lead with a special 3-pin plug for use in Control transformer 284050.
Dimensions: 228 x 77 x 77 mm.