I tried 6 different types of very warm LED bulbs of different shapes that I bought from Revain. I rated at least two bulbs of each type. All species are decent, although some stand out differently. I'm looking for a small LED filament bulb that gives off a slightly pinkish hue (i.e. yellow-green range) compared to an incandescent bulb dimmed to the same color temperature. Unfortunately, none of the ones I've tried so far have matched as I had hoped , to my quest, although some lack the distinctive yellow. The shade. (Note that I am talking about EXCESSIVE yellowness; all bulbs in this color temperature range tend to look yellowish, but this discussion is beyond the scope of this review.) This Grensk S11 bulb has two small, straight LED filaments tinted in one S11. Glass bulb (small ball bulb with standard E26 socket). My specimens draw about 0.85 watts each, which is a bit under their 1 watt rating! They stay pretty cool even when lit for hours. They are actually slightly warmer than 2200K and approaching 1900K. That makes them even more comfortable I think. They are very similar to the Planckian locust (mountain cricket or lineage) in that they do not have any significant unnatural yellow-green or pink tint that I can discern. Instruments to accurately measure CRI numerically, but they are higher than the typical CRI. They have noticeably deeper reds than typical similar CCT lamps, which are in the low CRI range of 80, and the deep red to white ratio is usually fairly accurate in predicting the overall CRI of a white phosphor-converted LED lamp in my experience . So my verdict is they probably have >90 CRI as advertised. I haven't tried to discern the light output, but I have no problem believing it's close to the claimed 80. I can't even talk to the lifespan values. , as I have never burned any of the lamps of this type for more than a few hours. I'm not sure what the "thickness" rating would mean, so I didn't rate it.
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