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Complete RIP-OFF - These are NOT 100 watt equivalency. They are 60-75 watt equivalency.
Once I received these bulbs I did a light comparison against Philips and Ecosmart 100 watt equivalency bulbs and found these the dimmest of the batch. The next thing I noticed was that the power rating for these bulbs isn't anywhere near what it should be for a 100 watt equivalency rating. Philips is 14.5 watts, Ecosmart is 14 watts, but TIWIN says these are 11 watt bulbs, which makes it near impossible to put out a similar lumen ratio. These put out 1100 lumens, whereas other 100 watt equivalecy bulbs clock in at around 1500-1750 lumens. Look at any equivalency scale on the internet; 1100 lumens is considered 75 watt equivalency. This is a boondoggle. You don't simply get to say something is 100 watt equivalency and it becomes fact. This company should relabel these as 75 watt equivalent watt bulbs because their lumen output is nowhere near what it should be for a 100 watt equivalency bulb. In lieu of that, TIWIN should at least reevaluate its business model before moving forward, but something tells me this is simply a money grab on the part of a company that assumes its customers don't know enough about wattage to lumen ratio to notice the difference. They simply hope shoppers will see a cheaper price and think they're getting a deal (when really they aren't).
Update - 8/8/16 - I just received an email from PROMIC asking me "if we can send you a free repalcement to resolve this problem? Cause customer reviews is important to us and we value your response. All responses will be used to further improve the quality of our service and products." Okay, first of all, this is a common tactic that companies use to silence their critics. We'll send you a freebie and your negative review goes bye bye. Nice try, PROMIC. I already stated what needed to be done and you simply decided to solve the problem in a way so many other companies do. Just throw some money (or a free product) at the problem and it will go away. If you really want to benefit from my review, try relabeling these bulbs as 75 watt fixtures because, again, they are not 100 watt equivalency bulbs. My review isn't going anywhere. It will stay here for all to see. Try not to misrepresent your bulbs in the future. That will help your product line more than anything else.
Update 8/10/16 - A pleasant surprise. I see that TIWIN has, perhaps in light of my comments, relisted these bulbs as 75 watt equivalency in terms of their lumen output. I would like to praise TIWIN and PROMIC for listening to customer feedback and responding in a way that is both honest and beneficial to its customer base.
Update 8/12/16 - Sigh. TIWIN/Promic has relisted these bulbs as 100 watt equivalency. The boondoggle continues. Buy these bulbs at your own risk. 1100 lumens is not 100 watt equivalency. It is 75 watt equivalency. Nice bait and switch, TIWIN.
Update 2/4/2017 - Since first reviewing this product, I now count some 500+ 5 star reviews that have been posted in the last six months, the vast majority of which focus solely on the bulb's brightness. I'm not saying this company has given away thousands of free bulbs in hopes of boosting their product ratings, but I find this pattern suspicious and highly coincidental. Again, purchase these bulbs at your own risk. They are NOT 100 watt equivalent.
July 2016 · Tools and Home Improvement · verified purchase