LED affects on Node Distance/Clones

OK so I run the following;

4 x Citi Cobs at 3500k - Flower
2 x Quantumn Boards 5000k - Veg

I have noticed 2 distinct issues.

1. Nodes are extremely close
   
   Is this due too the Color or am I running my LEDS too intense?
   
   Has anyone else noticed this?
   
   
   
2. Difficulty Cloning

I have cloned for years and still use the same method:

Take from close to the bottom, Slit, Gel, Place in Rapid Rooter.

Or Place in Aeroponic Cloner.

Neither seems to be working now.

I left some in the aero cloner for 2 months before they rooted.

They look super healthy A month later and zero root


Not sure what is going on, has anyone else experienced this?

try just the cobs, the 3500k will promote some sort of stretch usually. The 5000K have blue, which prohibit stretch.

Clones need very little light, and should be 36+inches from light, (100PAR) maybe try a cfl till they root?