1.Aluminium cover with high strength, 4MM toughened glass. Easy to adjust.2.40pcs High-power LED inside, sealed with special metal cup. High lighting efficency.3.Power supply with high capability and stable electric current.4.Light clear, striking and concentrated. And 5 colors can be lighted together in one tube5. Applicable: Advertisement lighting, Plaza views, Bridges, arts, age-old building, trees and tinder, etc.