If you are here wondering why your custom cables caused your RGB effects to be dimmer here are some answers
Drop Alt and Ctrl are keyboards that draws so much power from the USB cables, Wondering why the original cable that came in the box is only like 7ft?
The keyboard itself contains each individual key RGB lighting + More under-glows, By far its the keyboard with most RGB in one which drains so much power from the USB port.
Reasoning for short length cable is because with longer cables the power will require to travel further causing the power loss in transfer due to distance.
(Safest) Getting a Powered USB HUB (USB hub + Power outlet)
Configure in your Motherboard's BIO for USB Port to deliver more Power
Disclaimer: These method works during testing for us but may varies between individuals.