[standard aluminum frame] eye protection blackboard light [fixed derrick]] [standard aluminum frame] classroom eye-protection lamp [ceiling installation]] [standard aluminum frame] classroom eye-protection lamp [fixed derrick]] [standard aluminum frame] classroom eye-protection lamp [telescopic boom]] aluminum frame [leford drive] classroom eye-protection lamp [telescopic boom]] aluminum frame [philips drive] classroom eye-protection lamp [telescopic boom]] plastic edge model [standard configuration] classroom eye-protection lamp [fixed derrick]] plastic edge [standard configuration] classroom eye-protection lamp [telescopic boom]] plastic edge [leford drive] classroom eye-protection lamp [telescopic boom]] plastic edge [philips drive] classroom eye-protection lamp [telescopic boom]]

5000k (national standard special color temperature) 36w-40w