From the above Image you can see the Albedo (left) used for the "Bulbs" in their OFF mode
and the corresponding Emissive Texture (Right) used to Illuminate the bulbs when "on"
The resulting effects (seen in the centre image) Show large inconsistencies between the Emissive "level" and colour of the glow..
The White Lamp is perfect - having a nice illuminated centre and good glow
The Amber is just "Acceptable" with the Nice Illuminated centre but almost No Glow
The Blue is Totally unacceptable with Very little Illumination and very dark Glow
The Emissive values are IDENTICAL in each example and using an emissive level of 15
I am assuming therefore, the variation is due to the RBG / BRIGHTNESS values Of the textures?
so could anyone advise the parameters/values that would allow for a consistent lighting effect ?