James Hill Posted March 18, 2022 Share Posted March 18, 2022 Hello everyone, Looking in Ray Wu's store and realized there are differences in pixel power. My first purchase of pixels are... Color : full rgb color, 24bit, 256 gray scale LED Qty : 1pcs 8mm round hat 0.24w rgb led with 4pin common anode Input Volt : DC12V Max current : 66MA Max Power : 0.8W Protection Level : IP68 I found others that are exactly the same except......Current is only 20MA and the Max Power is only 0.24W I have set all my lights to 30% dim curve. Curious would you mix your display with different pixels? What is the lighting difference? Much dimmer? What are the drawbacks of these compared to my originals? With the lower power do I still get similar distance runs or is it much shorter. Not sure if I should just stick with what I have since 1000 pixels there is only about $100 savings. Any insight would be greatly appreciated. Thank you. Link to comment Share on other sites More sharing options...
TheDucks Posted March 18, 2022 Share Posted March 18, 2022 I would not mix on the same prop. and would use care with nearby. They will be noticably different Link to comment Share on other sites More sharing options...
Jimehc Posted March 18, 2022 Share Posted March 18, 2022 (edited) I have 28watt, 15 watt, 18.9 watt and 17.9 watt (50 Pixel Strings) through out my display - and although I seem to have mixed the Wattage's on 4 Mini Trees (I did not test New Lot from Vendor) and I did not even notice a difference.. Only after testing a string later did I realize that different wattage's were used... BUT, I did try to keep matching strings on a single prop... My newest purchase of Ray Wu 50 pixel strings - results in - 17.3 watt for 50 - 28.9 watts for 100 - 35.1 watts for 150 I'll also note: that every string of 50 pixels > that I have ever tested has a 1.2 / 1.3 watt draw with all pixels off Edited March 18, 2022 by Jimehc Link to comment Share on other sites More sharing options...
TheDucks Posted March 18, 2022 Share Posted March 18, 2022 1 hour ago, Jimehc said: I have 28watt, 15 watt, 18.9 watt and 17.9 watt (50 Pixel Strings) through out my display - and although I seem to have mixed the Wattage's on 4 Mini Trees (I did not test New Lot from Vendor) and I did not even notice a difference.. Only after testing a string later did I realize that different wattage's were used... BUT, I did try to keep matching strings on a single prop... My newest purchase of Ray Wu 50 pixel strings - results in - 17.3 watt for 50 - 28.9 watts for 100 - 35.1 watts for 150 I'll also note: that every string of 50 pixels > that I have ever tested has a 1.2 / 1.3 watt draw with all pixels off The 'idle power' is because you are powering the (smart) chip and voltage regulator. That should stay pretty much the same whatever the LEDs used (when all OFF). 5V strings will not have regulator consumption, but that is not much Link to comment Share on other sites More sharing options...
James Hill Posted March 18, 2022 Author Share Posted March 18, 2022 So is there a difference in the length of run? I would not mix in a single prop....but wondering about noticeable brightness from one string to another? Any drawbacks I should be aware of? Link to comment Share on other sites More sharing options...
Jimehc Posted March 18, 2022 Share Posted March 18, 2022 When comparing wattage's then one should assume a different level Link to comment Share on other sites More sharing options...
James Hill Posted March 18, 2022 Author Share Posted March 18, 2022 (edited) 31 minutes ago, Jimehc said: When comparing wattage's then one should assume a different level From 0.8W to 0.24W is almost 1/4....if all my lights are 30% dim curve....could I not increase the dim curve in prob def when building the prop to make similar the brightness? Or am I fooling myself for the cost savings....just spend the extra $100 and be done with it? Also the amps are different....how will that effect my thought process? Edited March 18, 2022 by James Hill Link to comment Share on other sites More sharing options...
TheDucks Posted March 18, 2022 Share Posted March 18, 2022 9 minutes ago, James Hill said: From 0.8W to 0.24W is almost 1/4....if all my lights are 30% dim curve....could I not increase the dim curve in prob def when building the prop to make similar the brightness? Or am I fooling myself for the cost savings....just spend the extra $100 and be done with it? Also the amps are different....how will that effect my thought process? P=I*E P is power in watts E is 12V I is Amps Chang one, and the others need to balance. Algebra. What 30% does is pulse the Voltage. It still draws the full amount, but the pulse make P an Average I over time Link to comment Share on other sites More sharing options...
Jimehc Posted March 18, 2022 Share Posted March 18, 2022 (edited) I really do not rely on vendor stated specs in any ad - you really have to test... (Most are not accurate) I test string Wattage at 100% Full White... Edited March 18, 2022 by Jimehc Link to comment Share on other sites More sharing options...
k6ccc Posted March 18, 2022 Share Posted March 18, 2022 Standard advise. For any given prop (or props in close proximity) use pixels from the same batch if at all possible. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now