LIS/OTD lightning climatology is featured on the NASA Earth Observatory Image Of The Day for March 31! You can view it at http://earthobservatory.nasa.gov.
In case you miss it, you will be able to view it after March 31 at http://earthobservatory.nasa.gov/IOTD/view.php?id=85600&eocn=home&eoci=iotd_readmore.
The LIS/OTD Climatology data sets are hosted at the GHRC and consist of gridded climatologies of total lightning flash rates seen by the spaceborne Optical Transient Detector (OTD) and Lightning Imaging Sensor (LIS).