It is most likely not C. flaccida (syn. lactea) because the lateral lobes of the labellum would have brown stripes. Another criteria for this species is the spike starting from the base of an adulte pseudobulbe, whereas C. glandulosa has the spike growing in the new growth, before or along with the leaves. (information from the book: Les Coelogynes, E. and J.C. George - 2011). As mentioned just before, C. glandulosa may not even exist in cultivation...)
It is more likely that you have C. Intermedia (C. cristata x C. tomentosa) or a pale form of C. Unchained Melody...