The International Commission on Illumination (usually known as the CIE for its French language name Commission Internationale de l'Eclairage) is the international authority on light, illumination[?], color, and color spaces.
... and
means "they are in me".
"-aham" (I) in the second line is nominative. na caaham =
"...and not I....", meaning "but I am not...".
"teshv-" (in/at/by them) a ...