ແສງສະຫວ່າງປ້ອງກັນການລະເບີດໄດ້ຖືກແບ່ງອອກເປັນສາມປະເພດ: IIA, IIB, ແລະ IIC.
ຫ້ອງຮຽນ IIA
Suitable for places with gasoline-like substances, ເຊັ່ນ: ສະຖານີອາຍແກັສ. ອາຍແກັສຕົວແທນສໍາລັບປະເພດນີ້ແມ່ນ propane.
ຫ້ອງຮຽນ IIB
Used in general factories where hazardous gases are present. ເອທີລີນ is the representative gas for this classification.
Class IIC
Designed for factories exposed to ໄຮໂດເຈນ, acetylene, or carbon disulfide.