{"product_id":"growpros-solutions-hm660-4ft-by-4ft-led-grow-light","title":"GrowPros Solutions HM660 660 Watt 4ft by 4ft LED Grow Light","description":"\u003cp data-start=\"107\" data-end=\"564\"\u003eThe \u003cstrong data-start=\"111\" data-end=\"154\"\u003eGrowPros Solutions HM660 LED Grow Light\u003c\/strong\u003e is a high-performance horticultural lighting system engineered for \u003cstrong data-start=\"222\" data-end=\"296\"\u003eindoor cultivation, hydroponic grow rooms, and greenhouse environments\u003c\/strong\u003e. Designed to deliver powerful illumination across a \u003cstrong data-start=\"349\" data-end=\"371\"\u003e4 ft × 4 ft canopy\u003c\/strong\u003e, this \u003cstrong data-start=\"378\" data-end=\"416\"\u003e660-watt full-spectrum LED fixture\u003c\/strong\u003e provides balanced light output that supports plant development from the vegetative stage through flowering. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"566\" data-end=\"936\"\u003eBuilt with a \u003cstrong data-start=\"579\" data-end=\"633\"\u003esun-like full spectrum enhanced with deep-red LEDs\u003c\/strong\u003e, the HM660 replicates natural sunlight to maximize photosynthesis and encourage vigorous plant growth. This optimized spectrum helps improve plant structure during the vegetative stage and boosts flowering performance for higher crop yields and improved quality. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"938\" data-end=\"1340\"\u003eThe fixture produces \u003cstrong data-start=\"959\" data-end=\"1046\"\u003eapproximately 1716 µmol\/s of PPF at 660W and up to 1820 µmol\/s when boosted to 720W\u003c\/strong\u003e, delivering strong canopy penetration and consistent PPFD across the grow area. With a photon efficacy of about \u003cstrong data-start=\"1159\" data-end=\"1173\"\u003e2.6 µmol\/J\u003c\/strong\u003e, the HM660 provides powerful output while maintaining energy efficiency compared with traditional HID or HPS lighting systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1342\" data-end=\"1793\"\u003eDesigned for commercial cultivation environments, the HM660 features \u003cstrong data-start=\"1411\" data-end=\"1481\"\u003ean integrated dimmer adjustable from 0–100% with a 110% boost mode\u003c\/strong\u003e, allowing growers to fine-tune light intensity according to plant growth stages. The system also supports \u003cstrong data-start=\"1588\" data-end=\"1632\"\u003e0–10V dimming and controller integration\u003c\/strong\u003e, including compatibility with professional control systems such as TrolMaster Hydro-X for automated lighting management. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1795\" data-end=\"2276\"\u003eThe fixture incorporates a \u003cstrong data-start=\"1822\" data-end=\"1872\"\u003efoldable multi-bar design with passive cooling\u003c\/strong\u003e, ensuring efficient heat management and quiet operation. Its modular structure includes extendable side bars that can be added to expand coverage for larger grow trays such as \u003cstrong data-start=\"2049\" data-end=\"2086\"\u003e3 ft × 6 ft or 4 ft × 6 ft setups\u003c\/strong\u003e. Built with durable components and an estimated lifespan exceeding \u003cstrong data-start=\"2154\" data-end=\"2170\"\u003e54,000 hours\u003c\/strong\u003e, the HM660 offers long-term reliability for professional growers. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"2278\" data-end=\"2281\"\u003e\n\u003ch3 data-start=\"2283\" data-end=\"2299\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"2300\" data-end=\"3510\"\u003e\n\u003cli data-start=\"2300\" data-end=\"2412\"\u003e\n\u003cp data-start=\"2302\" data-end=\"2412\"\u003e\u003cstrong data-start=\"2302\" data-end=\"2339\"\u003e660W full-spectrum LED grow light\u003c\/strong\u003e optimized for indoor cultivation \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2413\" data-end=\"2531\"\u003e\n\u003cp data-start=\"2415\" data-end=\"2531\"\u003e\u003cstrong data-start=\"2415\" data-end=\"2433\"\u003eCoverage area:\u003c\/strong\u003e ideal for \u003cstrong data-start=\"2444\" data-end=\"2471\"\u003e4 ft × 4 ft grow spaces\u003c\/strong\u003e (up to 5 ft × 5 ft) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2532\" data-end=\"2635\"\u003e\n\u003cp data-start=\"2534\" data-end=\"2635\"\u003e\u003cstrong data-start=\"2534\" data-end=\"2550\"\u003eHigh output:\u003c\/strong\u003e up to \u003cstrong data-start=\"2557\" data-end=\"2595\"\u003e1820 µmol\/s PPF at 720W boost mode\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2636\" data-end=\"2733\"\u003e\n\u003cp data-start=\"2638\" data-end=\"2733\"\u003e\u003cstrong data-start=\"2638\" data-end=\"2660\"\u003ePhoton efficiency:\u003c\/strong\u003e approximately \u003cstrong data-start=\"2675\" data-end=\"2693\"\u003e2.6 µmol\/J PPE\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2734\" data-end=\"2853\"\u003e\n\u003cp data-start=\"2736\" data-end=\"2853\"\u003e\u003cstrong data-start=\"2736\" data-end=\"2772\"\u003eFull spectrum with deep-red LEDs\u003c\/strong\u003e for both vegetative and flowering stages \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2854\" data-end=\"2946\"\u003e\n\u003cp data-start=\"2856\" data-end=\"2946\"\u003e\u003cstrong data-start=\"2856\" data-end=\"2904\"\u003eIntegrated dimmer with 110% boost capability\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2947\" data-end=\"3068\"\u003e\n\u003cp data-start=\"2949\" data-end=\"3068\"\u003e\u003cstrong data-start=\"2949\" data-end=\"2995\"\u003e0–10V dimming and controller compatibility\u003c\/strong\u003e (TrolMaster Hydro-X supported) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3069\" data-end=\"3182\"\u003e\n\u003cp data-start=\"3071\" data-end=\"3182\"\u003e\u003cstrong data-start=\"3071\" data-end=\"3100\"\u003eFoldable multi-bar design\u003c\/strong\u003e for easier installation and maintenance \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3183\" data-end=\"3286\"\u003e\n\u003cp data-start=\"3185\" data-end=\"3286\"\u003e\u003cstrong data-start=\"3185\" data-end=\"3211\"\u003ePassive cooling system\u003c\/strong\u003e for low heat and quiet operation \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3287\" data-end=\"3417\"\u003e\n\u003cp data-start=\"3289\" data-end=\"3417\"\u003e\u003cstrong data-start=\"3289\" data-end=\"3324\"\u003eEnergy-efficient LED technology\u003c\/strong\u003e offering up to \u003cstrong data-start=\"3340\" data-end=\"3375\"\u003e30% savings vs HID\/HPS lighting\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3418\" data-end=\"3510\"\u003e\n\u003cp data-start=\"3420\" data-end=\"3510\"\u003eBuilt for \u003cstrong data-start=\"3430\" data-end=\"3510\"\u003ecommercial indoor farms, grow tents, hydroponics, and greenhouse cultivation\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GrowPros Solutions","offers":[{"title":"Default Title","offer_id":51856020996379,"sku":"GPS-HM-660","price":499.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/0151\/0171\/files\/growpros-solutions-hm660-660-watt-4ft-by-4ft-led-grow-light-6163350.png?v=1772852789","url":"https:\/\/greenthumbdepot.com\/products\/growpros-solutions-hm660-4ft-by-4ft-led-grow-light","provider":"Green Thumb Depot","version":"1.0","type":"link"}