Sureshs LR4 statement was definitely a bold one. 

Does anyone have a reference to learn the differences between LR4 and CWDM4 for the 100G market?  

If the module cost is higher for LR4 is higher is it only suitable for select applications or is it the current technology available that holds the price higher thus limiting the opportunities for that spec in today's market?  

Thanks and good luck,

Jque