These bulbs last a long long time since they are low wattage. They are very bright and strong. Great for vintage reading lamps. They do give off heat, but other than that they are the best light bulbs ever made. I hate LED bulbs because they're not as bright and I hate the unnatural unflattering light they throw. These clear glass bulbs give off the perfect light.
Love my bulbs that go in my 1960’s high intensity college lamp. Impossible to find any more. Thank you for holding on to these golden oldies!!!! They’re perfect!!!