A solid state lighting lamp for replacing a gas discharge lamp having a light emission area with a given light center length (A) and a given light emission area length (B), which gas discharge lamp is compliance with ANSI ANSLGC78.42-2009, the solid state lighting lamp comprising: a base portion including a connector ; an upper portion opposite said base portion; and a plurality of linear arrays of solid state lighting sources mounted on a body and extending in parallel with a central axis of the lamp, each linear array having a central point within 10% tolerance of the given light center length (A) from the connector, wherein, for each linear array: an upper solid state lighting source lies on an upper virtual conical surface extending from a point of said central axis coinciding with an upper edge of the light emission area under a first internal angle (α) between said central axis and the upper virtual conical surface in a range 40- 85°; and a lower solid state lighting source lies on a lower virtual conical surface extending from a further point of said central axis coinciding with a lower edge of the light emission area under a second internal angle (β) between said central axis and the lower virtual conical surface in a range 40- 85°; wherein the distance between the point and the further point of said central axis is the given light emission area length (B). a base portion including a connector ; an upper portion opposite said base portion; and a plurality of linear arrays of solid state lighting sources mounted on a body and extending in parallel with a central axis of the lamp, each linear array having a central point within 10% tolerance of the given light center length (A) from the connector, wherein, for each linear array: an upper solid state lighting source lies on an upper virtual conical surface extending from a point of said central axis coinciding with an upper edge of the light emission area under a first internal angle (α) between said central axis and the upper virtual conical surface in a range 40- 85°; and a lower solid state lighting source lies on a lower virtual conical surface extending from a further point of said central axis coinciding with a lower edge of the light emission area under a second internal angle (β) between said central axis and the lower virtual conical surface in a range 40- 85°; wherein the distance between the point and the further point of said central axis is the given light emission area length (B). an upper solid state lighting source lies on an upper virtual conical surface extending from a point of said central axis coinciding with an upper edge of the light emission area under a first internal angle (α) between said central axis and the upper virtual conical surface in a range 40- 85°; and a lower solid state lighting source lies on a lower virtual conical surface extending from a further point of said central axis coinciding with a lower edge of the light emission area under a second internal angle (β) between said central axis and the lower virtual conical surface in a range 40- 85°; wherein the distance between the point and the further point of said central axis is the given light emission area length (B). <EOS>