Mercury lamp bulb 1) Made from borosilicate 4.0 glass2) Lighting bulbs: a) Mercury lighting: BT70, BT75, BT80, BT90 and BT120 b) Sodium lighting: BT62, T37.5 x 180, T37.5 x 208, T46 x 220, T46 x 265 and T46 x 290c) Halogen lighting: ED55, ED75, ED90 and ED120 Mercury lamp bulb