Beautiful bulbs, with a nice shade in their light, but unfortunately their low frequency of operation is quite noticeable, at least in mobile video recording of the space, something that from my previous experiences I suspect will unconsciously tire me. It is the first time I am using Geyer and the truth is that because of this it disappointed me compared to Philips and Osram which I have experience with and provide really good lighting from every aspect, without their flickering being noticeable, not even in video recording (In the few models I have bought or seen at least). I cannot perceive their color rendering, due to the particular shade of light, and consequently it has not bothered me, something that might somewhat mitigate the problem with the flickering that I mentioned earlier. After all, we are used to these shades in sodium lamps that the PPC columns have with the yellow light and which have color rendering below 45% if I remember correctly, so from this perspective the low CRI might also add a special note. In general, because lamps of such shade are not usually used for tasks that require concentration, but are turned on for a short time for relaxation, perhaps any imperfections do not play such a big role. As for their durability over time and use, I have not tested it yet. Maybe I will come back when they burn out. Edit: After a year of use, I can say that they seem somewhat tiring. I only use them for an hour before I go to sleep, but their color is perhaps more yellowish than warm, I cannot pinpoint exactly what is causing it, but I end up using them very rarely now, and I prefer to turn on a halogen lamp with low intensity, even just for atmosphere.