Lamp measurements please

[Unimatrix01]

Hi all, I have been searching and searching for lamp measurements on here with little luck so I wanted to ask you lovely people if I could have some help here as I understand that different Tardises used different Fresnel lamp sizes and hoped to be able to find out what they were.

[Volpone]

Hi.  Welcome aboard.  The place can be a little hard to find your way around.  Hopefully someone with more time than I have right now can help you out a bit, but in the mean time, you may want to poke around here:  https://tardisbuilders.com/index.php?board=79.0