DC12V or DC24V,PC dome and aluminium base, halogen lightsurce;(lightbar,revolving lightbar,rotating lightbar) Feature specification:1)Work voltage: DC12V or DC 24V2)Optional within 80W,100W,150W,200W,300W speaker in the middle of lightbar3)This lightbar adopt high quality halogen bulb. revolving lightbar is very brightness,warning light(caution light)is popular !4)this warning light (warning sign ...