... frequency :100-130v(127v) or 220-240v ,50/60 Hz ,2.Power available :15w ,20w,25w ,30w ,36w ,45w,65W,85W ... on .Package:color box or blister card according to customer's reqirements .Superiority :1.High luminous efficiency : 1 piece of energy ... ,1 x 25w energy saving lamp's luminous flux(1400LM) = 5 X 25w incandescent bulb's luminous ,2. Instant start, flicker free 3 ...