When testing the LED power supply, what's the cause of the explosion proof filament of the test bench?

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General explosion-proof lights on three cases: 1., the test drive power supply has a short-circuit situation. 2. the measured driving current is too large. 3. the drive circuit design is unreasonable.

General explosion-proof lights on three cases: 1., the test drive power supply has a short-circuit situation. 2. the measured driving current is too large. 3. the drive circuit design is unreasonable.

General explosion-proof lights on three cases: 1., the test drive power supply has a short-circuit situation. 2. the measured driving current is too large. 3. the drive circuit design is unreasonable.