we tested some filament LEDs and here is one of the best. At slightly lower efficiency (other 6W lamps create some also 750lm) offers the lamp a CRI (RAE) of almost 90 and a light that the filament lamp can almost hold a candle. Thanks to the shape of the light generation it is also suitable for lamps that are geared towards the large-area light source a filament and not with matt light (ESL or LED Bulbs) or point sources (LED) function.