I'm designing a photovoltaic powered installation. In my current design, I'm using a 12V battery, and I intended to power the lighting directly at that voltage without the usage of an inverter.

I understand that at 12V voltage drops quickly with distance unless thick wires are used. I wanted to know how much voltage I can afford to drop in order for the led lighting to still work.

The problem is the technical specifications of lighting only say "12v", and I find it impossible for them to require exactly 12V because it's not possible to have a 0 voltage drop.

So, looking for example at [this light](https://www.amazon.es/Shinning-star-industrial-exteriores-Resistente-impermeable/dp/B078T78TJ9/ref=sr_1_3?ie=UTF8&qid=1528739623&sr=8-3&keywords=foco%20led%2012v), what's the minimum voltage it will need to light up?