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Sodium-vapor lamp - Wikipedia
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![Sodium Vapour Lamp low press. 90W klar [BY22D] Phi lightspares Shop](https://lightspares.com/media/catalog/product/4/5-138203/sodium-vapour-lamp-low-press-90w-klar-by22d-phi.jpg?width=265&height=265&store=sub&image-type=image "Sodium Vapour Lamp low press. 90W klar [BY22D] Phi lightspares Shop")
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high pressure sodium lamp RNP-T/LR RNP-T/LR SUPER - Radium 34415211 - KS Light
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Sodium-vapor lamp - Wikipedia
High Pressure Sodium Lamps
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Sodium Vapour Lamp
The Sodium Lamp - How it works and history
