Lightning Protection Guide 3rd Updated Edition DEHN, Flash hazard, risk assessment, flash protection, life safety, development of standards, The LIGHTNING PROTECTION GUIDE from DEHN has been the trademark for practice-oriented technical literature in the fields of lightning and surge protection for buildings, installations and systems. The book had to be revised and enlarged due to changes in standardization and technical progress. Now the third revised edition of the English LIGHTNING PROTECTION GUIDE is available.