C.1895 cobalt blue tipped carbon filament light bulb 16cp 108v M.E.W. with porcelain insulation from Duanesburg NY ($63, $12 shipping) dec-2022

C.1900-1903 cobalt blue tipped carbon filament light bulb from Scarborough ME apr-2022

C.1904-1910 cobalt blue tipped carbon filament light bulb from Kearneysville WV feb-2022

Pair of tipped cobalt blue carbon filament light bulbs, one 16cp, one 4cp for marquee sign, both working, from Deming NM sep-2022

Cobalt blue tipped carbon filament light bulb 32cp 110v 120w from Winchester NH ($20) apr-2022

Cobalt blue tipped carbon filament light bulb C&C SPECIAL 120w 220v from Winchester NH ($25, $12 shipping) apr-2022

C.1900 Shelby tipped carbon filament light bulb 4cp 104v, very rare cobalt blue color, porcelain insulation, from Belleville IL jul-2022

C.1900-1903 pair of Shelby tipped carbon fil. light bulbs, rare cobalt blue and emerald green colors, probably 4cp, green untested from Belleville IL ($227.50, $10 sh.) jul-2022

C.1900-1903 Shelby tipped carbon filament light bulb 4cp 104v, very rare cobalt blue color, porcelain insulation, from Belleville IL ($228.49, $9 shipping) jul-2022

Shelby cobalt blue tipped carbon filament light bulb 110v with mushroom shape, original label, from Belleville IL aug-2022

Shelby cobalt blue tipped carbon filament light bulb with mushroom shape from Belleville IL aug-2022

Shelby cobalt blue tipped carbon filament light bulb with mushroom shape from Belleville IL sep-2022

C.1904 small cobalt blue tipped Shelby carbon filament light bulb, owned by GE engineer Walter Gillett, from Eugene OR feb-2022

C.1910s Edison Mazda tipped cobalt blue uncoiled tungsten cage filament light bulb from Soddy Daisy TN ($22.38, $21 shipping) mar-2022

Pair of Edison Mazda uncoiled tungsten cage filament light bulbs, one tipless cobalt blue, one a rare 60v 40w, from Fort Mohave AZ ($35, $11 shipping) jan-2022

Cobalt blue round tipless carbon filament heat bulb 115v 200w from Bolingbrook IL ($51, $11 shipping) apr-2022

Kyp-go blue balafire flickering flame light bulb 15w 115-120v with original box from Mohrsville PA may-2022

Lot of 4 colored bulbs, 1 very rare Buckeye large yellow double carbon hairpin fil. bulb pat. oct-15-1907, 1 matching cobalt blue, from Sarasota FL ($75, $35 sh.) jul-2022

Matte blue Jewel coiled tungsten filament light bulb 25w 120v with original sleeve, Jewel Incandescent Lamps, from Gloversville NY sep-2022

Box of cobalt blue tubular tipless carbon filament light bulbs 30w 115v, Nalco Lamps St. Louis Mo., from Stillwater MN (not sold) oct-2022

C.1890s Packard tipped carbon filament light bulb 16cp 120v with really bad paint job, dipped in faint blue paint, plaster ins., from Escondido CA ($42, $9 sh.) jul-2022

C.1915 tipped daylight blue RAINBOW early coiled tungsten filament light bulb 75w 115v from Southampton PA ($25 b.i.n., $5 shipping) dec-2022

C.1970s blue balafire dancing flickering carbon filament light bulb with 7up can lamp, turn-un lamp, coin bank can, the uncola, Kyp-Go, from Mohnton PA mar-2022

GORO or Gorou daylight blue decorative coiled tungsten filament light bulb with two birds inside, similar to KOKKA, made in Japan, 110v 60w from San Diego CA feb-2022

Rare recycled tipped daylight blue light bulb with looped carbon filament, untested, not sold may-2022

Several mixed lots of old light bulbs, carbon fil., tungsten fil., TH Thomson-Houston base, candelabra base, daylight blue, many do not work, from Deming NM oct-2022

C.1890s ruby red tipped carbon filament light bulb Imperial B.M. Co., Bryan Marsh, with plaster ins., red tip, untested, from Scarborough ME ($117.55, $9 shipping) apr-2022

C.1895 porcelain shell TH Thomson-Houston base tipped ruby red Edison carbon filament light bulb 52v with red tip, bryant socket, from Springfield MA nov-2022

C.1895 ruby red Westinghouse pin base tipped carbon fil. light bulb w. porcelain ins. and Westinghouse push-in type socket, untested, from Normal IL ($75, $13 sh.) may-2022

C.1900-1903 ruby red tipped carbon filament light bulb with red tip and with porcelain insulation from Soddy Daisy TN ($22.72, $21 shipping) mar-2022

C.1920 large ruby red tipped Brilliant Mazda early zigzag coiled tungsten fil. light bulb 300w 120v with 1950s GE sleeve, from Two Rivers WI ($6.50, $22.65 sh.) apr-2022

C.1922-1926 ruby red tipless GE Mazda uncoiled tungsten cage filament light bulb 120v 60w from Soddy Daisy TN ($10, $21 shipping) mar-2022

Crompton heavy duty ruby red bayonet base coiled tungsten filament light bulb 230v 40w made in England, property of HRM government, from Heywood UK ($12) jul-2022

Rheotherm ruby red round tipless carbon filament heat bulb 100w from Sachsen Germany sep-2022

Ruby red carbon filament light bulb with red tip, untested, from Scarborough ME ($20.50, $9 shipping) apr-2022

Ruby red tipped Zokul carbon filament light bulb 115v 120w from Bolingbrook IL ($23, $11 shipping) apr-2022

TH Thomson-Houston Shelby light bulb with detached carbon filament, ruby red colonial carbon light bulb 16cp 110v, from Westlake OH jan-2022

Tipped ruby red carbon filament light bulb from Wells ME feb-2022

Tipped ruby red Edison carbon filament light bulb 16cp 115v with red tip, from DeKalb IL ($95 not sold) feb-2022

C.1900-1903 Shelby tipped carbon filament light bulb, rare ruby red color, porcelain insulation, from Belleville IL ($204.26, $9 shipping) jul-2022

Shelby ruby red tipped carbon filament light bulb with mushroom shape from Belleville IL aug-2022

Shelby ruby red tipped carbon filament light bulb with mushroom shape from Belleville IL sep-2022

C.1910s National Mazda tipped amber or brown uncoiled tungsten cage filament light bulb from Soddy Daisy TN ($62, $21 shipping) mar-2022

C.1895 non-working emerald green tipped carbon fil. light bulb w. plaster ins., also porcelain TH Thomson-Houston bulb, 2 others, from Westlake OH ($70, $10 sh.) apr-2022

C.1895-1899 tipped dual carbon hairpin filament light bulb emerald green with plaster insulation, green vacuum tip, from Kennebunk ME jan-2022

C.1904-1910 tipped emerald green carbon filament light bulb, likely 16cp, from Williamsport PA ($76, $6 shipping) nov-2022

Emerald green tipped Femco carbon filament light bulb 110v 16cp with porcelain insulation from Winchester NH ($66.75, $12 shipping) mar-2022