Dim bulb question

[GuntherM]

Hi all,
this is an electricity question, I want to develop a dim bulb tester, with a lamp from 60w and a second one from 40w.
What I have already, a variac, with in front a decoupling transformer from 240VAC.
The variac gives supply to the dim bulb(s), now is the question, what kind of switch I'm going to need, to put between lamp 1 and 2? Why the split? I have enough 60w old stock lamps, but fewer from 40w.
So I can put the lamps in series (100w), or decoupled (60w). The lamps also going to be used as load for a digital Volt and current meter.
From there the current goes to an outlet, that comes out the cable gutter. The wooden plank, will be mounted against a wall, with self-made distance buses, to protect the cables on the backside.
Look at the rough pictures I made, to get more sight of the project, the plank has to cut to a smaller format, also the cable gutter. And has to be painted as well, so it looks neat on my work bench.
Of course, every safety rules going to be applied. It's just the switch that concerns me.
Thank you for the help in advance.

[IanB]

What is your question about the switch? Any mains rated switch would be fine. Are you asking how to wire the switch?

[Gyro]

...
So I can put the lamps in series (100w), or decoupled (60w).
...

A small correction. You need to put the 60W and 40W in parallel for 100W.

[GuntherM]

The second time I made the same error on this forum, it's parallel indeed.
So, a double pole switch will do the trick?

[Gyro]

I would use two switches, then you can select 40W, 60W or 100W lamp configurations.

[jeroen79]

The second time I made the same error on this forum, it's parallel indeed.
So, a double pole switch will do the trick?

Depends on what you want the switches to do.

One switch, in series with the paralled lamps:
-Acts as master power switch.
-(Un)screw the lamps to set the power limit.
-If this is a two pole switch you can switch out both the line and neutral.

Two switches, each in series with a lamp, the switch-lamps in parallel:
-Turns on the power per lamp.
-Use the switches to set the power limit.
-Only needs to be a single pole switch.

One switch, parallel to the paralled lamps:
-Bypasses the lamps so they do not impede any current.
-(Un)screw the lamps to set the power limit.
-Only needs to be a single pole switch.

You can combine these.
For example a master power switch, a switch to bypass the lamps and switches to set the power limit.