Materials: Luminaire body uses super-thin pre-coated metal, and the lamp holders use fire-retardant ABS. Merits: Luminaire body is corrosion-resistant, and it is easy to install, and could be interconnected one by one. Applicable occasions: Widely applicable to luxurious hotels, classrooms, shopping centers,parlors and supermarkets. Luminaire mounting method: Suitable for recessed mounting.