LEDMO 50w- http://amzn.to/2tfoTLB edit: sometimes this link doesn't work properly, make sure you select the 50w warm white 3000k
eBay 100w multichip- http://stores.ebay.com/LED-Town-2015?...
Amp meter- http://amzn.to/2nnX9Rg
With the amp meter we can test the lights efficiency.