... high efficiency of power, full range input voltage, never affected by unstable voltage of electric network, illuming and reach normal luminous ... decay rate:<5% within 3000 hours7. service life:≥40000Hours8. input voltage:100 ~ 240 V9. frequency scope:47 ~ 63 Hz10. ... high efficiency of power, full range input voltage, never affected by unstable voltage of electric network, illuming and reach normal ...