When figuring the voltage drop in a branch circuit with multible light fixtures.

I can size my load (11.5 amp) & voltage drop (2.14%) to the first fixture based on a 277v (271.08v) circuit with the total length (130') of the circuit.

When I proceed on to the next fixture how is that handled?

Do I need to reduce the 277-volts to the next fixture based on the calculations in my homerun back to the panel ( 271.08) and keep reducing the voltage based on each calculation until I reach the end of the circuit?
Or is it to remain 277v through-out the calculation and I just add each voltage drop % to the home run calculation (2.14%) to get my total voltage drop % to the end of the circuit.

Please explain your precise problem once more.
Of course the voltage drop increases towards the common feeding point, as there the current is greater.
If you keep within 5 % of the supply voltage, that is never considered a problem.
If you need a detailed solution, you should provide detailed information, i.e. a wiring diagram with all lights involved, quantities, power consumption, cable diameters used, etc.