Conduit for electrical wires?

Hi all—we are doing LED lighting strips under the benches and behind the backrest.  We are using a foil vapour barrier. When you are bringing the electrical wires for the lighting out through the foil vapour barrier, do you have to use conduit, and if so, do you need a special high temp conduit?  My electrician says he needs to be able to push the wires back into the wall when he’s finished doing the wiring for the led strips.  It seems like he wouldn’t be able to do that if the wires were taped with foil tape where they exit the vapour barrier.  And if you need high temp conduit, can you provide some details?  Is there any particular type you would recommend? Also, do you need to run the conduit the whole length of the wire, or just a foot or two close to the exit point of the vapour barrier? As always, thanks in advance. This subgroup is a lifesaver.