Many years ago I discovered over at audiophilestyle forum, devices that run at various voltages will take the higher voltage and throw excess off as heat, lower voltages will consume more of supplied voltage, thus, less waste and heat. On the other hand, some claim better sound quality with higher voltage lps on these devices. I've never heard a noticeable change in sound quality.
As for current draw, I've learned many years ago to over spec my lps, therefore, lps can supply more current than device it powers requires. Lps runs cooler not working to supply max amp it's capable of. Recent thread here on premature failures of Uptone Lps 1, I suspect due to it's very limited amperage output, its straining to supply needed amps to devices its powering, this mean greater heat, heat is enemy of reliability, durability. I've been powering my router for many years with way over spec lps, this on 24/7 high amp draw device, lps and router runs cool, no issues. Same with every single lps and device I'm powering, all run relatively cool with proper lps voltage and amperage match to device it's powering.