I am using this bulb from last 2 months and I had got much effect in my electrity bill.Before the bulb I was getting 3000 rupees per month but from last 2 month my bill value is decreasing.I had buyed this bulb from amazon for rs 249 which is very much resonable.I had buyed 9 bulbs for my whole house and Now I am getting a huge profit with it.It is a powers saving bulb.if saves 80 percent of electicity supply.If u are willing to buy this then buy it from amazon.