{"product_id":"dli-zenith-900w-fs-dc-led-toplight","title":"DLI Zenith 900W FS DC LED Toplight – 1000W HPS Replacement","description":"\u003ch2\u003eA 900W LED Toplight That Swaps In for 1000W HPS\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eDLI Zenith 900W FS DC\u003c\/strong\u003e is a full-spectrum \u003cstrong\u003eLED toplight\u003c\/strong\u003e from \u003cstrong\u003eDutch Lighting Innovations\u003c\/strong\u003e, designed as a direct replacement for \u003cstrong\u003e1000W HPS fixtures\u003c\/strong\u003e on the same layout. It delivers \u003cstrong\u003e2,400 µmol\/s\u003c\/strong\u003e at \u003cstrong\u003e2.7 µmol\/J\u003c\/strong\u003e from \u003cstrong\u003e900W\u003c\/strong\u003e through \u003cstrong\u003e140° wide-beam optics\u003c\/strong\u003e, and DLI rate the energy saving over the HPS it replaces at \u003cstrong\u003eup to 25%\u003c\/strong\u003e. The slim \u003cstrong\u003e98 x 21 x 13 cm\u003c\/strong\u003e, \u003cstrong\u003e12 kg\u003c\/strong\u003e body is built to sit under greenhouse climate screens, carries an \u003cstrong\u003eIP65\u003c\/strong\u003e rating and dims from \u003cstrong\u003e30% to 100%\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2,400 µmol\/s from 900W\u003c\/strong\u003e at \u003cstrong\u003e2.7 µmol\/J\u003c\/strong\u003e, measured across 400–800 nm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne-for-one 1000W HPS replacement\u003c\/strong\u003e using up to \u003cstrong\u003e25%\u003c\/strong\u003e less energy, by DLI's figures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e140° wide-beam optics\u003c\/strong\u003e for even light with fewer hotspots and shadows\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt around cooling\u003c\/strong\u003e – the spacing of the LED bars and venturi-effect fins keep LED temperature down for a longer working life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOSRAM top-bin LEDs\u003c\/strong\u003e, chosen by DLI for low light degradation over the years\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimmable 30–100%\u003c\/strong\u003e to follow natural light levels and crop stage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP65\u003c\/strong\u003e, with CE, CSA, DLC and UKCA certification; designed and made in the Netherlands\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHPS Heat, Running Costs and Fading Output\u003c\/h3\u003e\u003cp\u003eA 1000W HPS lamp turns much of its power into heat, and its light output falls away over the life of the lamp, so rooms run hot and light levels drift down between lamp changes. The Zenith keeps the coverage pattern of the HPS it replaces while drawing less power, and its cooling design holds LED temperature low, which DLI link directly to \u003cstrong\u003elow light degradation\u003c\/strong\u003e and a long service life. The even spread from the wide-beam optics also avoids the bright and shaded patches that lead to \u003cstrong\u003euneven growth\u003c\/strong\u003e across a crop.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplace each 1000W HPS fixture with one Zenith\u003c\/strong\u003e on your existing layout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn a greenhouse, hang it below the climate screen\u003c\/strong\u003e, where its slim profile blocks less daylight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupply:\u003c\/strong\u003e 208–400V, so standard 230V UK mains is within range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet output between 30% and 100%\u003c\/strong\u003e with a DLI controller to match natural light and crop stage\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower draw:\u003c\/strong\u003e 900W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePPF:\u003c\/strong\u003e 2,400 µmol\/s (400–800 nm, at 25°C ambient)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficacy:\u003c\/strong\u003e 2.7 µmol\/J\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture size:\u003c\/strong\u003e 98 x 21 x 13 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e DLI Zenith 900W 208–400V FS DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectrum:\u003c\/strong\u003e full spectrum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBeam angle:\u003c\/strong\u003e 140°, wide-beam optics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage:\u003c\/strong\u003e one-for-one replacement for a 1000W HPS fixture on the same layout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 208–400V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimming:\u003c\/strong\u003e 30–100%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP rating:\u003c\/strong\u003e IP65\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 12 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e CE, CSA, DLC, UKCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e the Netherlands\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 5 years\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cdiv class=\"hcs-faq\"\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWill it replace my 1000W HPS fixtures one for one?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes. DLI designed the Zenith 900W FS DC as a replacement for 1000W HPS fixtures in any installation, relying on its light distribution to cover the same layout with up to 25% less energy.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eHow do I control and dim it?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eOutput runs from 30% to 100%. For scheduling and dimming across a room, DLI's DLM-4 Zone Controller works with all DLI fixtures and manages up to four independent zones with temperature-based dimming.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWhy is the output measured to 800 nm?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eDLI measure the 2,400 µmol\/s across 400–800 nm at 25°C ambient, so the figure includes light beyond the 400–700 nm PAR band. Compare it with other fixtures measured the same way.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWhat does FS mean?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eFull spectrum – this is the full-spectrum version of the Zenith. DLI also build Zenith spectra with far-red.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003ch3\u003eWorks Well With\u003c\/h3\u003e\u003cdiv class=\"hcs-related\" style=\"display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 0;\"\u003e\n\u003ca href=\"\/products\/dli-digital-controller-dlm-4-zone\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/dli-digital-controller-dlm-4-zone-1.png?v=1785291879\u0026amp;width=160\" alt=\"DLI DLM 4 Zone Digital Controller\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eDLI DLM 4 Zone Digital Controller\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eSchedules and dims DLI fixtures by zone\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/dli-digital-controller-dlmini\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/dli-digital-controller-dlmini-1.png?v=1785293080\u0026amp;width=160\" alt=\"DLI DLMini Digital Controller\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eDLI DLMini Digital Controller\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eOne-button dimming for DLI lights\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"Dutch Lighting Innovations","offers":[{"title":"Default Title","offer_id":53929896411402,"sku":"LGT-DUTH-007-01","price":887.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/dli-zenith-900w-fs-dc-led-toplight-default-title-1.jpg?v=1792262362","url":"https:\/\/hydrocropshop.co.uk\/products\/dli-zenith-900w-fs-dc-led-toplight","provider":"Hydro Crop Shop","version":"1.0","type":"link"}