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430 watt Philips Son Agro High Pressure Sodium lamp. The Info Button shows a close-up of the lamp. The close-up showing the arc tube may vary from the lamp picture. This lamp may be burned in any postion. Manufacturer s Code: 31710-7 Initial Lumens: 54 000 The 430-watt Philips HPS lamp is a real workhorse. When burned in a 430 ballast the lamp gives more lumens per watt than standard 400 watt hps lamps. The light also has slightly higher blue content. When used in a standard 400-watt ballast a slightly higher lumen output and better color range will occur. These High Pressure Sodium lamps are used in greenhouses to elevate the red orange and yellow electromagnetic wavelengths hitting the plant. This (along with shorter photo-periods) signals the plant to start producing bloom hormones. Increased red orange and yellow wavelengths can produce higher yields and more abundant blooms and fruiting sites when quality plant foods and bloom leaf sprays are used.