First Row: Warm White
Second Row: Daylight
Bottom Row: Frosted.
Original series, two at left and two at bottom: Four small vertical filaments. The originals dated 08/31/15 had non dimming drivers, and a revision dated 05/10/16 had supposedly dimmable drivers. I have dimmable daylight and non-dimmable warm white, but I suspect the other permantations exist. This had a slightly smaller globe than the others, holographic packaging. Green Driver board. 7 watts rating, 7.3 watts actual draw
First Revision, 2nd from left 03/12/17 (Soft White) and 04/17/17 (Daylight), Code (Z1)these have six small slanted filaments, 9 watts rating, 8.4 watts actual draw.
Second Revision, 2nd from right. These change to non-holographic packaging. 10/11/17. Daylight maintains Z1 code and lamp looks identical, Warm White is version (K) which draws 7.2 watts and has 4 long slanted filaments held by a square shaped top. The Z1 daylight has bronze silk-screeing and the K warm white has engraving on the base instead. All other models have black silk screening. The K version can dim to a very low level and does without flickering like all previous versions did. K version has white driver board
Third Revision, on Right. Model changes to (C) with revision 09/12/18 for both colors, different white driver board. Different long slanted filaments from K version Dims without flickering but not as dim as K version. Still rated at 9 watts, draws 7.6 watts daylight, 8.0 warm white