i was playing a bank robbery map and while blowing up the vault i blew up light blocks so watch the little vid below

how to reproduce:

ignite any explosive near a light block

expected results light blocks should be unobtainable in survival

the vid i recorded was too long let me cut it 

FOR THE LORDS SAKE PLEASE EXTEND THE MAX VIDEO BANDWIDTH 10 MEBABYTES TRANSLATES TO 8 SECONDS OF VIDEO