A long-life deuterium lamp that delivers precise light throughout its lifetime is available from Heraeus Noblelight GmbH. After 2000 h of operation, the DX lamp maintains a noise level below 2 × 10^–5 AU, a full order of magnitude better than the industry standard of 5 × 10^–4 AU. The company says that the lamp has been approved by high-performance liquid chromatography instrument makers.

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