If seeing the defilements as defiling luminosity turns your crank, great, as long as defilements are seen as defilements and mind is freed from them, so there is kusala citta-bhavana.
Luminous, pure, mirroring, clean, watery, sky-like, whichever, follow the recipe and you'll get a piece.
Ven. Walpola Rahula:
"It is instructive to note here that there is a striking agreement between this concept of citta in the two suttas above and the Mahayana doctrine of the tathagatagarbha. Citta is qualified by the Pali word pabhassara. The Lankavatara-sutra (a Mahayana sutra of a later date than the Anguttara-nikaya and which has greatly influenced Zen), qualifies tathagatagarbha by the corresponding Sanskrit word prabhasvara (luminous). It says that the tathatagarbha is prakrtiprabhasvara (luminous by nature) and prakrtiparisuddha (pure by nature), but it appears impure 'because it is defiled by adventitious defilements' (agantuklesopaklistataya). (Cf. the Pali expression in the two suttas above: agantukehi upakkilesehi upakkilittham.) In the Lankavatara-sutra the term tathagatagarbha is used as a synonym for alayavijnana. Now alayavijnana is another term for citta. So the Lankavatara-sutra statement that the tathatagarbha is 'luminous by nature' and 'pure by nature' and that it is 'defiled by adventitious defilements' is tantamount to saying that citta (mind) is 'luminous by nature' and 'pure by nature', and that it is 'defiled by adventitious defilements'. It is obvious then that the concept of the 'Ox-herding Pictures' is derived from Pali and Sanskrit sutras as well as from the ancient commentaries and that it was later elaborated into a set of graphic drawings. http://www.dharmaweb.org/index.php/Zen_ ... ola_Rahula
There are also a couple dozenish little suttas near the pabhassara sutta on citta that might help.