Switching relay for push-button circuit in garage

Hello,

I am currently installing the surface-mounted (access point) electrical installation (cable laying, sockets, switches, access point boxes) in our garage so that later an electrician can connect it to the supply line. I have installed two LED tubes which I want to switch from two different locations. A push-button circuit will be used, i.e., I have two push-buttons. Currently, I am running the lamp connections with a 3x1.5 cable into a junction box. To the push-buttons, there are each 5x1.5 cables. I now have the following options/variants: (1) switching relay in the junction box (2) switching relay in a small sub-distribution mounted on the DIN rail. For 1, 2: either smart controllable (Shelly, etc.) or "dumb".

Due to the current situation, there is no sub-distribution in the garage yet, only a supply line from the house 3x1.5. I can only connect a maximum of 2 lamps and a socket here due to the insufficient cross-section of the cable. A sub-distribution would therefore be overkill for this one line! (Later there will be a proper sub-distribution with a supply line of at least 4mm2).

I would also prefer a variant with smart control, e.g., Shelly 1 or Shelly Pro. Without smart control, I would use a "pulse relay for flush mounting 8-230V 1S ES61-UC Eltako" – but basically only as an emergency solution.

Which variant would you recommend and why? And which switching relays would be suitable? If a sub-distribution is used, which one would be cheap and suitable here and what advantages might I have with a small sub-distribution? As already mentioned, I would like to integrate the relay into my smart home, which is realized wirelessly (zigbee, Shelly). One more note: This installation will very likely be operated in parallel with the proper garage sub-distribution. So to speak, lighting + gate drive via the house circuit breaker and the remaining sockets, also high power, wallbox, etc., whatever, then via the later sub-distribution.

I would use a two-way switch.

I spontaneously thought of a bistable 24v relay. 24v power supply and low-voltage wiring to the push buttons. Easily integrable later into any [SmartHome] system.

I spontaneously thought of a bistable 24v relay. 24v power supply and low voltage wiring to the push buttons. Easily integrable later into any SmartHome

Is it allowed to put 24V and 230V in the same junction box? Your solution would be a distribution box with a 24V power supply mounted on a DIN rail, right?

I would use a two-way switch.

That would of course be the easiest and is already applicable as such. However, unlike in the house, I want to design the electrical installation more flexibly. That would not work with a classic two-way switch with on-off switches. Hence my push buttons (Busch-Jaeger ocean rocker switches), which I want to connect to a relay. The relay then switches the lighting circuit.

Is it allowed to put 24V and 230V in the same junction box? Your solution would be a distribution box with a 24V power supply on a DIN rail, right?

Exactly. Distribution box with 24V power supply on DIN rail, etc.