Costco stocks these energy saving bulbs and periodically promotions from energy companies makes these bulbs very economical to purchase. We used these bulbs extensively on our electric sockets controlled by normal switches – those did not work with dimmer switches as explained in one of our articles.
The bulbs came in a variety of wattage ratings and replacement ratings and we have had experience with most of the available replacement options – 40W, 60W, 100W, and 125W. These products boast a good warranty of one year from the time of purchase. The catchy claims on their packaging adds to their appeal – “Lasts up to 7 years” and “This bulb lasts 10 times longer than a standard 750 hour bulb”. Sadly, in our experience, all these claims are inaccurate and the bulbs are inferior in quality. Further, this experience does not seem solitary as the reviews are less than glowing. None of the bulbs we purchased were able to make it past a year of normal use. Some succumbed much earlier. Of course, the warranty is good on paper, but in a practical sense worthless as it requires you to ship it back to their headquarters for a replacement. Given that the per-unit cost of the product is low, this additional step involved is not worth your time as the shipping charge outweighs the value of the product. For some inexplicable reason, Costco continues to carry these bulbs to this day.
For our part, we switched to other brands (GE especially) for CFL lighting, even though the PG&E promotion did not apply to those. Currently, LED bulbs, which are even more energy efficient have become available and some brands come with an outstanding 5-year warranty as well.
Last Updated: 01/2015.