Aqua Signal 34 navigation lights will run just fine on a normal 24 Volt system, including the absorption charging voltages of close to 29 Volts. We have used them for years without an issue.
The only thing to be careful of: If you have flooded lead acid batteries and you run an equalization charge. Depending on the exact specifications from your battery manufacturer that can run up to 34 Volts and will be a problem for many devices.
