Most tower lights look the same. Same colors. Same mounting thread. Some even share the same product photos. Here's the difference nobody talks about: Where is it installed? If the answer is anywhere near gas, vapor, dust, or pressure — then the light itself can become an ignition source. That's not a worst-case scenario. That's physics. The THT-EX L1920 is built for exactly that reality. UL-Listed (UL 508 / 50E / 50 / 121201) Class I Div 2, Groups A, B, C, D Class II Div 2,