... . with certificates, RoHS,CE,and FCC. 2. Environmental efficiency, no flicker, no radiation 3. OEM 4. Price ... and constant current power supply,improved power efficiency and extended lamp life.2.High luminous efficiency,energy saving more than 70% ... optical design, illumination uniformity, standard spot direction,energy utilization efficiency.4.Good heat dissipation design, more securety, life time ...