Under light conditions Under dark conditions   Growth optimum           Carotenoid optimum   Growth optimum    Carotenoid optimum Total carotenoids (mg/l) (Mean ± SD) 11.39 ± 0.11                        16.35 ± 0.01 8.15 ± 0.02     10.11  0.01 Biomass (g/l) (Mean ± SD) 2.13 ± 0.006                          2.17 ± 0.01  0.82 ± 0.01   0.97 ± 0.01

Table 4: Effect of illumination on the biomass (g/l) and total carotenoid production by Halorubrum sp. TBZ126.