Miles away...
When my reading in BH1750.h library is at 529 lux
My reading in MySensors is at 34-39 lux
So I'm not sure why.... I'm guessing maybe it's the resolution mode in MySensors?
Here's my serial print. Please disregard the Buf label, its just my sloppy labelling. 
I noticed that the readings are completely different between MySensors and BH1750 library or perhaps I'm misinterpreting the lux values?
I've used the sample sketch in both in the BH1750 library and MySensors.
Any ideas why?
Thank you!
Have you tried using 10uf? That fixes the problem for me.
You can use between 4.7 upto 47uf. Most people I've read the 10uf fixes it.
As stipulate at mysensors:
Maybe, Mysensors should really highlight that?
I'm measuring ambient lighting and motion sensor (Its directly using a 12v PIR ) at the moment in my room and using a
Mosquitto+Paho+MongoDB+SlamData for some analytics. I'm curious what analytics I'll get with this setup. Who knows right?
Then you'll notice there's an OLED. It's just simply a replacement for the serial() so I can see the debug than plugging the USB all the time.
@sundberg84 @gohan its solved. Thanks for the help! Bad, 4.7uf, poor wiring and not to mention "a man look" on which pins I've used
Thanks again!
Found out that my W5100 clone is having serious auto-negotiation issues with my linksys switch. I jumped it earlier like this
Hmm... no good.. I've basically moved a known working breadboard + 4.7uf from my other prototype below. I'm still getting the same error.
I'll triple check the wiring and replace all of them just in case.
It turns out the W5100 ethernet is working after using the sample sketch from Arduino.
Now plumbed NRF directly on the W5100 shield:
Now I'm getting this:
@sundberg84 it was blank. I'll start with just simply the ethernet shield and use the DhcpChatServer sketch to rule out it's not the shield then move my way to the NRF. Thanks for the rapid response. I'm testing it now.