# Real consumption of SMD5050 Led Strips

I'm building my home lights with an SMD5050 Led strips. And I'm completely lost after comparing specs consumptions with real measured data.

So on, I have 5 stripes and 1-to-5 Splitter from my controller: 2 legs for 10m each, both sides fed from the splitter. 5th one is single-feed from a same 1-to-5 splitter. So, that's properly builded scheme and I don't expect

In total: 10m 30Leds/m for 7.2W/m and 15m 60Leds/m with a 14.4W/m. Oh yes, that's should be 288W and 20A x 14.4V!

I have a Wattmeter, that stands before 220V input of my 15A 12V Led power supply, and I can measure only 90W of consumption in the HARDEST case, which I mean 14.4V output of supply and White permanent color on strips. That's 3 times less than proposed to be (don't counting imperfection of 220-12V transformation).

Why so? Does it mean that I can connect more and more strips, and the power supply will handle it? (Specs for supply is 180W max consumption, so currently it's loaded just 50%).

How to figure out, where the real consumption is? I don't have a reason to untrust my Wattmeter - used it with everything in my home from phone chargers (4W) till AC (800-1200W), and collected data seemed very real..

• Welcome to EE. How much power are you measuring after the power supply? – vtolentino Jun 4 '20 at 13:18
• The specs on led strips tend to be wrong most of the time unless it comes from a reputable importer. And even then. You should measure the voltage and current at various points of the led strips to be sure. – Passerby Jun 4 '20 at 14:23
• My guess is your strips are too long. The resistance along the strip lowers the available voltage, especially at the end of the strip (you should be able to measure/verify this) so the strip only works at full power at the end close to the supply. What are voltages on all ends of the strips? – akwky Jun 5 '20 at 10:39