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Hortilux Ceramic HPS Lamp and Ballast Kit, 600W, 120/240V | Discounted Hydroponic Commercial Indoor & Outdoor Grow Supplies at GrowGeneration
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iPower 2-PACK 400 Watt Super HPS Grow Light Bulb for Magnetic and Digital Ballast" - Walmart.com
Bay Hydro Ballast High Frequency 1000w SE / DE & 1000w HPS L
250w 400w 600w Watt High Pressure Sodium HPS Light Bulb MH Grow Lamp For Ballast | eBay
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What's difference between metal halide and high pressure sodium?
400 W High Pressure Sodium Ballast Kit Keystone HPS-400A-P-HP-KIT 5 Tap 120/208/240/277/480 V for Lamp Type S51
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What Does A Grow Light Ballast Do? - Grow Light Info
35 watt high pressure sodium ballast kits 866-637-1530
SunMaster 600w Super HPS Bulb | HTG Supply
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400 Watt HPS Ballast Kit | Grow Light High Pressure Sodium Ballast | HTG Supply
