... is also super energy-saving can be installed easily. Specification: LED Viewing angle: 15-20 degrees Glass type: With glass Optional ... -hall, house decoration, hotels, etc. Advantage: we are specilized in LED products as a manufatcory in china for many years and ... to the real situation of LED lamp , it can ensure the good performance of LED bulb,such as high lumen maintainence, long life span ...