... ,Nylon . 3)Good heat dispersion4)PC cover is good for tenacity and quakeproof5)Tube need not glue but screw ,and ... bright,and consumes 70-80% less energy.2). No RF interference, no buzzing noise, no UV radiation.3). No fluorescent flickering.4 ... easy installation.7). Solid- state, high shock/ vibration resistant8). Adopting low- pressure constant current power supply, no glare, it indeed achieves ...