Features (FL-552): 1) Power: 110W (2 x 55W OSRAM) 2) Color temperature: 5,400°K 3) Working voltage: AC 100 - 110V / 50 - 60Hz, 200V - 240V / 50 - 60Hz Inner packing: Foam + single box Outer packing: 2pcs/ctn Carton dimensions: 70 x 30 x 40cm Features (FL-554): 1) Power: 220W (4 x 55W OSRAM) 2) Color temperature: 5,400°K 3) Working voltage: AC 100 - 110V / 50 - 60Hz, 200V - 240V / 50 - 60Hz 4) Output control range: full - 1/2 Inner packing: Foam + single box Outer packing: 2pcs/ctn Carton dimensions: 70 x 34.5 x 54cm Features (FL-556): 1) Color temperature: 5,400°K 2) Working voltage: AC 100 - 110V / 50 - 60Hz, 200V - 240V / 50 - 60Hz 3) Output control range: full - 1/3 Inner packing: Foam + single box Outer packing: 2pcs/ctn