When you fire the mana blaster equipped with a flash lens you crash with

java.lang.NullPointerException: Ticking entity
at vazkii.botania.common.item.lens.LensLight.collideBurst(LensLight.java:30)

Crash Log:
http://pastebin.com/LB6aRVeg

Instance:
minecraft-1.8.9
forge-11.15.0.1699

Mods:
Baubles-1.8.9-1.1.3.0
Botania.r1.8-248-MC1.8-568ee04
jei_1.8.9-2.19.0.93
InventoryTweaks-1.60-beta-30
ironchest-1.8.9-6.0.115.759