... solar panel.2)Battery:Ni-MH,2.4V/600mAH,GP temperature-resistant. 3) Light Source: using 4LED of 9200mcd NICHIA,φ5 ... : Housing is transparent PC. 8)Using Temperature Range (Degrees):-20°C~+80°C.9) Storage Temperature Range (Degrees):-20°C~+40°C. 11 ... .water,oil,chemical and heat resistant 8.Very high reflectivity 9.easy installation 4pcs LED solar road stud