LED Tape PSU and Voltage-Drop Run
Total load, recommended PSU size, and end-of-run voltage of a constant-voltage LED strip, with a too-long flag when the far end dims. Oversizing the PSU does not fix the drop -- power-inject or feed both ends; 24 V tape reaches roughly double a 12 V run.
Formula and source
load = power_per_ft x length; psu = load / (1 - headroom); current = load / voltage; end_drop = current x (resistance_per_ft x length) / 2; end_voltage = voltage - end_drop.
Constant-voltage LED strip loading and voltage drop, by name.
Audience
This tile is built for trades and the adjacent professions in the Stage and Live Production group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.
Related tools
Posture
Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.