Hi daoism, yes, light (with photoperiod of 8hrs) is present from day one till now. And don't worry, HC is prone to rotting when establishing into the new environment. 'Emerse' in this context means 'grown above water'.

Thank you Burky. Substrate is aquarium gravel (JBJ) without any base fert. The brown 'stuff' you see at the back is actually dirt accumulated over time. With no worries of algae (for now), it is actually a pretty hassle free way of growing HC, hahaha... Water level is, as mentioned in the earlier post, till 'flooding' or waterlogged. Being emersed, temperature is as per ambient, i.e. between 29 and 31 degree celsius.