Non-@C01130@ source containing mercury vapour at pressures ranging from \(50\) to several hundred \(\mathrm{kPa}\) (\(1\ \text{atm} = 101.325\ \text{kPa}\)). Emits mostly from \(200\) to \(1000\ \text{nm}\) with the most intense lines approximately at \(218\), \(248\), \(254\), \(266\), \(280\), \(289\), \(297\), \(303\), \(313\), \(334\), \(366\), \(406\), \(408\), \(436\), \(546\) and \(578\ \text{nm}\).