Eveready Base B22D 7-Watt LED Bulb (Cool Day Light)

It has been 3 months I am using this light, in my study room of 10x10. Though for study the light is not sufficient. But other than that when you are using computer or doing some other work, u can easily use it. The light shows more lumen (about 40%) compared to a 15W CFL, when i measured from the mobile software. So if you get it in offer, then its really money saving. I got this product in Rs. 234 (Rs. 50 gift card). And now since its price goes down so must purchase item.

Bulb is original quality

Excellent

There is lithium battery inside the lamp. Bad product.

Important things is it has only 0.5 PF rating and more bright as my 21 Watt Osram high efficiency 0.85 PF CFL. So if you consider VA rating then actually it is 14 VA LED gives higher light as 24.7VA CFL. so technically it is 44% efficient if you consider VA rating . this means you will get 44% more backup from battery Inverter as compare to CFL and if you interested in electricity bill then according to Watt rating your electricity bill will be cut by 1/3 as house electricity meter only measure Watt. (Unit). Although It does not comes with any warranty buy it looks Quality product . I brought 8 of these and replace all CFL in my house.

Good product value for money.

After a reviewer claimed that as this eveready LED has 0.5 PF and hence we will be charged double of the mentioned wattage but a couple other reviews contradicted him. Hence I googled this a bit and this is the best answer I got. Hope it helps others who were as confused as me !! “Power factor is the ratio between real power and apparent power. Real power is how much power the load is actually using and apparent power is the product of how much current is flowing and the Voltage. Real power is measured in Watts, and apparent power is measured in Volt Amps (VA). If you think back to when you learned about electricity fundamentals, you might remember that current (Amps) times Voltage equals Watts. This is true for a direct current system and it is also true for an alternating current system with a power factor of 1.0. An old fashioned incandescent light bulb, due to being a purely resistive load, has a power factor of 1.0. However, many electrical devices including LED and CFL light bulbs have power factors less than 1.0. What this means is that while they might be rated at 13 Watts real power, they will draw more current than you would suspect. Assuming a 120V system, 13 Watts should require approximately .11 Amps (120V*.11A = ~13W). In reality, a typical LED light bulb has a power factor of .6 (and as low as .2 or less!). This means that the apparent power of the bulb is more like ~22VA (13Watt/.6 power factor). Remembering that apparent power is current * volts you can find that with a .6 power factor this bulb is using ~.18 Amps. The good news is that residential power meters typically measure real power and not apparent power…for now. This means that you are charged by the kWh and not Volt Amp hour. However, utilities are now beginning to install “smart meters” that are capable of measuring your home’s overall power factor (the average power factor of all connected loads) and charging you accordingly. For now, it seems like you are in the clear and you can trust the numbers printed on your bulb’s packaging.” Ordered thus product for 274/- & 215/- for 7w & 5w respectively. This is my first experience with LED bulbs and following are me observations Pros: - Biggest plus is price factor. Cheapest amongst reputed brands. - 100 Lumens/watt is excellent. Light is bright enough and is sufficient. - In a small room there is no observable difference between 7w & 5w but in a bigger room one can notice the extra 2w. - Cool day light gives a nice shade but don’t know if it is better or worse than other brands having same shade. But am happy with this. - B22 base hence no modifications required. - I was using 15w CFL and this 5w certainly gives equivalent brightness.7w a bit more. Cons: - On the site it is mentioned that it offers 30months warranty from packaging or 24 months from invoice date whichever is lower but there is no warranty card or any mention on the package. So I don’t know what to do if the bulb fails in warranty period. Amazon should clearly mention this in the product page. (One star reduction for that) VERDICT – LEDs are the future. They are getting cheaper. They last longer, more power efficient. Time to replace the CFLs. PS – Attaching a few pictures of markings.

Got with 4 batteries. And the light glows