{"product_id":"vivosun-240-cell-seed-starter-kit-led-lights-heat-mats","title":"Vivosun 6-Pack 240-Cell Seed Starter Kit","description":"\u003ch4\u003e\u003c\/h4\u003e\u003ch2\u003eVivosun 6-Pack 240-Cell Seed Starter Kit with 2 LED Light Sets \u0026amp; 2 Seedling Heat Mats\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cp\u003eSeeds started in a cold room under weak window light germinate slowly and unevenly, then stretch into thin, leggy seedlings. The Vivosun 6-Pack 240-Cell Seed Starter Kit controls the three things that matter most at this stage: root-zone warmth, light, and humidity. Six 40-cell trays give you 240 cells in total. Two thermostat-controlled heat mats warm the root zone from 34°F to 122°F, and two dimmable 5000K LED light sets mount right on the domes.\u003c\/p\u003e\n\u003cp\u003eEach tray set includes a black 40-cell insert, a base tray, and a clear humidity dome with 3.6\" of headroom. Two adjustable vents on each dome let you fine-tune humidity and temperature as seedlings develop, and a center handle lifts the dome without disturbing the trays. Drainage holes in every cell help prevent overwatering, and the black cells support healthy root growth.\u003c\/p\u003e\n\u003cp\u003eThe LED bars run on four brightness levels (25%, 50%, 75%, and 100%) and three timer cycles: 8, 12, or 18 hours on. Each heat mat's digital controller shows both the real and set temperature, and its IP67-rated surface stands up to drips and spills. Fill the cells with soil or rockwool cubes, then transplant seedlings to pots or the garden when they're ready.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cstyle\u003e\n  .image-gallery-container{max-width:1240px;margin:20px auto;}\n  .image-gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;}\n  .gallery-item{aspect-ratio:1;overflow:hidden;border-radius:8px;}\n  .gallery-item img{width:100%;height:100%;object-fit:cover;display:block;transition:transform 0.3s ease;}\n  .gallery-item:hover img{transform:scale(1.05);}\n  @media (max-width:768px){\n    .image-gallery{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;gap:0.75rem;}\n    .gallery-item{flex:0 0 85%;scroll-snap-align:start;}\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"image-gallery-container\"\u003e\n  \u003cdiv class=\"image-gallery\"\u003e\n    \u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_6-Pack_240-Cell_Seed_Starter_Trays_6.jpg?v=1790883728\" alt=\"Vivosun seed starter tray with 3.6 inch humidity dome and adjustable vents\"\u003e\u003c\/div\u003e\n    \u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_6-Pack_240-Cell_Seed_Starter_Trays_5.jpg?v=1790883728\" alt=\"Vivosun seed starter dome with embedded LED lamps, handle, and snap design\"\u003e\u003c\/div\u003e\n    \u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_6-Pack_240-Cell_Seed_Starter_Trays_4.jpg?v=1790883728\" alt=\"Vivosun seedling heat mat with dual digital temperature controller and IP67 surface\"\u003e\u003c\/div\u003e\n    \u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_6-Pack_240-Cell_Seed_Starter_Trays_3.jpg?v=1790883728\" alt=\"Vivosun LED grow light bars with dimming levels and timer settings\"\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cstyle\u003e\n  .features-grid-container{display:flex;flex-wrap:wrap;justify-content:center;gap:1rem;padding:2rem 0;font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;margin:0 auto;max-width:1240px;}\n  .feature-card{background-color:transparent;padding:1.5rem;border-radius:8px;text-align:center;flex:0 1 240px;box-sizing:border-box;}\n\u003c\/style\u003e\n\u003cdiv class=\"features-grid-container\"\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🌱\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003e240 Cells Across 6 Trays\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003eSix 40-cell trays, each with its own base tray and humidity dome.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e💡\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003eDimmable LED Light Bars\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003e5000K bars with 4 brightness levels and 8, 12, or 18-hour timer cycles.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🔥\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003eThermostat-Controlled Heat\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003eSet the mats from 34–122°F, with real and set temperatures shown side by side.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🌫️\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003e3.6\" Vented Domes\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003eTall clear domes with two adjustable vents to fine-tune humidity and temperature.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e💧\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003eDrainage \u0026amp; Root Support\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003eDrainage holes prevent overwatering, and black cells support root growth.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🛡️\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003eIP67-Rated Heat Mats\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003eA water-resistant surface handles drips and spills from watering trays.\u003c\/p\u003e\n    \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e6x Humidity Domes with Adjustable Vents\u003c\/li\u003e\n  \u003cli\u003e6x 40-Cell Seed Trays\u003c\/li\u003e\n  \u003cli\u003e6x Base Trays\u003c\/li\u003e\n  \u003cli\u003e2x LED Light Bar Sets with Timer\/Dimmer Controller and Power Adapter\u003c\/li\u003e\n  \u003cli\u003e2x 10\" × 20.75\" Seedling Heat Mats with Digital Temperature Controllers\u003c\/li\u003e\n  \u003cli\u003e1x Heat Mat User Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4 style=\"margin-bottom: 0;\"\u003eSpecifications\u003c\/h4\u003e\n\u003cstyle\u003e.styled-spec-container{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid #eee;border-radius:8px;margin-bottom:1em;}.styled-spec-table{width:100%;border-collapse:collapse;}.styled-spec-table thead{background-color:#f8f8f8;}.styled-spec-table th,.styled-spec-table td{padding:12px 15px;text-align:left;vertical-align:top;}.styled-spec-table th{font-weight:bold;color:#333;border-bottom:2px solid #ccc;}.styled-spec-table td{border-bottom:1px solid #eee;}.styled-spec-table tbody td:first-child{font-weight:500;color:#444;}.styled-spec-table tbody tr:last-child td{border-bottom:none;}\u003c\/style\u003e\n\u003cdiv class=\"styled-spec-container\"\u003e\n  \u003ctable class=\"styled-spec-table\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eSpecification\u003c\/th\u003e\n        \u003cth\u003eValue\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTotal Cells\u003c\/td\u003e\n\u003ctd\u003e240 (6 trays × 40 cells)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTray Material\u003c\/td\u003e\n\u003ctd\u003ePET, PP\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAssembled Tray Set\u003c\/td\u003e\n\u003ctd\u003e15.2\" × 10.1\" × 5.6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHumidity Dome\u003c\/td\u003e\n\u003ctd\u003e15.2\" × 10.1\" × 3.6\"; 2 adjustable vents\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e40-Cell Seed Tray\u003c\/td\u003e\n\u003ctd\u003e14.0\" × 8.9\" × 2.0\"; drainage holes\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBase Tray\u003c\/td\u003e\n\u003ctd\u003e14.7\" × 9.7\" × 2.3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLED Light Bar\u003c\/td\u003e\n\u003ctd\u003e12.2\" × 0.6\" × 0.3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLED Color Temperature\u003c\/td\u003e\n\u003ctd\u003e5000K\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLED Power \/ Input\u003c\/td\u003e\n\u003ctd\u003e12W; 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLED Dimming\u003c\/td\u003e\n\u003ctd\u003e25%, 50%, 75%, 100%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLED Timer\u003c\/td\u003e\n\u003ctd\u003e8H on\/16H off, 12H on\/12H off, 18H on\/6H off\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLED Certification\u003c\/td\u003e\n\u003ctd\u003eUL\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeat Mat Size\u003c\/td\u003e\n\u003ctd\u003e10\" × 20.75\"\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeat Mat Power\u003c\/td\u003e\n\u003ctd\u003e20W ±10%, 120V AC, 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeat Mat Temperature Setting\u003c\/td\u003e\n\u003ctd\u003e34–122°F; default 95°F\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeat Mat Water Rating\u003c\/td\u003e\n\u003ctd\u003eIP67 surface\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeat Mat Service Life\u003c\/td\u003e\n\u003ctd\u003e≥30,000 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch4\u003eSupport \u0026amp; Manuals\u003c\/h4\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px;\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_Seedling_Heat_Mat_Manual_2.pdf?v=1790884028\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"display: inline-flex; align-items: center; background-color: #f7f7f7; border: 1px solid #ddd; border-radius: 8px; padding: 12px 18px; text-decoration: none; color: #333; transition: background-color 0.3s ease, box-shadow 0.3s ease;\"\u003e\n\u003cspan style=\"font-size: 1.5em; margin-right: 12px;\"\u003e📄\u003c\/span\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eSeedling Heat Mat User Manual\u003c\/span\u003e\n\u003c\/a\u003e\n\u003c\/div\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003cp\u003eThe Vivosun Seedling Heat Mats are covered by a 1-year limited manufacturer warranty against manufacturing defects from the original date of purchase.\u003c\/p\u003e\n\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cdiv class=\"faq-container\"\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eHow many seedlings can I start with this kit?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eThe kit includes six 40-cell trays, for 240 cells in total. With two heat mats and two LED light sets, you can heat and light two tray sets at a time while the rest start under your own conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eHow do I set the heat mat temperature?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003ePress ON\/OFF to start heating at the default 95°F, then use the + and − buttons to set your target between 34°F and 122°F. The display shows both the SET TEMP and the REAL TEMP. The screens turn off after a period of inactivity; press + or − to wake them.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eWill the heat mat remember my temperature setting?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eTurning the mat off with the ON\/OFF button keeps your current setting. Unplugging the power cord or a power outage resets it, so you'll need to set the temperature again.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eWhere should I place the heat mat?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eUnfold the mat on a flat, stable, dry surface free of sharp objects, then set the tray on top. Never place the mat inside the tray, cover it with soil, or put insulating materials over it. The mat is for indoor use only and shouldn't be used in water, despite its water-resistant surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eHow do the LED light settings work?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eThe inline controller offers four brightness levels (25%, 50%, 75%, and 100%) and three timer cycles: 8 hours on\/16 off, 12 on\/12 off, or 18 on\/6 off. The 5000K bars mount on the dome to bring light close to young seedlings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eCan I use rockwool instead of soil?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eYes. The cells work with soil-based seed starting mix or rockwool cubes. When seedlings are ready, remove them from the cells and transplant them into pots or your garden.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eHow do I use the dome vents?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eRotate each vent cover to open or close the airflow holes. Keep the vents more closed for higher humidity during germination, then open them gradually to lower humidity and temperature as seedlings grow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"VIVOSUN","offers":[{"title":"Default Title","offer_id":52607097962712,"sku":"WEB-SST-3-0006","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_6-Pack_240-Cell_Seed_Starter_Trays_1.jpg?v=1790883728","url":"https:\/\/trimleaf.com\/products\/vivosun-240-cell-seed-starter-kit-led-lights-heat-mats","provider":"Trimleaf","version":"1.0","type":"link"}