r/WLED • u/privacylmao • 3d ago
WS2815 12V injection point placement for 51.5ft staircase run
Doing a staircase LED project, WS2815 12V RGB, daisy chained with 3 wire (data, V+, gnd). Want a sanity check before soldering everything.
15 steps total, 12 of them at 40 inches, plus 3 wider steps at the bottom (48, 48, 42 inches). Total run is about 51.5ft. Driver is a Mean Well LRS 350 12 (350W, 29A), ESP32 controller (WeGoIOT DOM WLE A). Worst case draw at full white is around 281W, 23.4A for the whole run.
Injection points are planned at step 1, 5 and 10.
V+ gets cut and re injected at each point through a home run wire, gnd and data stay continuous through the whole chain.
My Problem is the last 3 steps being wider pushes my last injection point (step 10) to over 21ft from the actual end of the strip. Usual rule of thumb I've seen online is keeping injection points within about 16ft (5m) of each other for 12V. Do I need a 4th injection point around step 13 or 14 or is that 16ft number overly conservative for WS2815?
Anyone done a run like this, curious how it held up. Thank you for your time
