fényelem angolul

photocell [photocells]▼◼◼◼noun
[UK: ˈfəʊ.təʊ.sel] [US: ˈfoʊto.ʊ.sel]

phototube▼noun
[UK: ˈfəʊ.təʊ.ˈtjuːb] [US: ˈfəʊ.təʊ.ˈtjuːb]

photovoltaic cells▼◼◼◼