Day-time running light

Moin,
I live in the north, near the Danish border, and not only for this reason have I been thinking about a day-time driving light for some time. I believe that this is fundamentally sensible, but I do not want to break the fence about the benefits here, because there are also different views on it. But I would like to think about making the most of the feasibility:
I want to wg. Let only two lamps glow for electricity consumption / fuel consumption. The TFL is also not intended to illuminate the lighting of the fittings. I've been thinking about adding additional lights as TFL. As far as electricity consumption is concerned, this would certainly be the optimal solution. Unfortunately, I find in my not the right place for it, or I don't want to confuse his face with any attachments.

So the solutions either remain the light as before to switch on completely, or to use existing luminaires as TFL via an additional switching device. I can't stand light because it's not bright enough. Only passing beam or fog lamps remain. In principle, the use of the NSW makes sense, because the continuous use of the lamps wear out faster and eventually they are broken. The passing beam, which you really need in the dark, is then still available. And this is where the ghosts are separated from each other. In many forums it is repeatedly claimed that the use of NSW as TFL is not allowed. IMHO is the Mumpitz. I went to the TÜV today and asked. It is not written anywhere that NSW may NOT be used as daytime running light. Only the installation regulations must be complied with (e.g. Distance from the outer edge of the vehicle max 400mm) and the brightness must not be less than a certain value. Of course, the TFL must switch off automatically when the driving light is switched on. Using the NSW, they are no longer a NSW, but a TFL. The passage in the stvo that the NSW can only light up in certain weather conditions (I don't want to go into details now) in connection with the stand or driving light, is no longer applicable. If you turn on the driving light, the TFL goes off and the NSW are available again as such and then fall again under the above mentioned. Switch-on conditions.
By the way, the dipped-beam (diving light) is NOT a driving light any more when it is converted to the TFL.
I have now ordered a control unit for 34 € with which I will switch my NSW accordingly. In addition, the luminosity of the lamps as TFL is approximately . 20% reduction, which of course also reduces consumption a little.
I'll tell you about the experience with it. I am also determined that the police will often "question" me about this.