Light variations of the blue hypergiants HD 168607 and HD 168625 (1973-1999)
Str¨omgren differential photometry of HD168607 and HD168625 collected during the previous 27 years is analysed. We bring to an end our quarter of a century monitoring of these objects and conclude that HD168607 shows typical variability of an uneventful LBV, whereas HD168625 remains to be classified as a variable hypergiant, or a marginally-dormant LBV. The long-term light- and colour behaviour of HD168607 indicates the possible presence of a very slowly-developing S Dor phase – that is, a bright phase that coincides with redder colours. Besides the Cygni-type microvariability, no other signs of ultrashort-periodic variability has been observed.