{"id":3172,"date":"2026-07-14T21:27:54","date_gmt":"2026-07-14T19:27:54","guid":{"rendered":"https:\/\/www.ortoled.com\/?p=3172"},"modified":"2026-07-19T10:39:15","modified_gmt":"2026-07-19T08:39:15","slug":"full-spectrum-vs-custom-spectrum","status":"publish","type":"post","link":"https:\/\/www.ortoled.com\/en\/full-spectrum-vs-custom-spectrum\/","title":{"rendered":"Full spectrum vs custom spectrum"},"content":{"rendered":"\n\n\nFull spectrum vs custom spectrum: which one to choose | ORTOLED<\/title>\n<meta name=\"description\" content=\"White full spectrum or LED with configurable red\/blue ratio? How to choose the right spectrum for vegetative and flowering.\">\n<!-- slug proposto, NON confermato in WPML: verificare\/creare la pagina e correggere se necessario -->\n<link rel=\"canonical\" href=\"https:\/\/www.ortoled.com\/en\/blog\/led-full-spectrum\/\">\n<meta property=\"og:title\" content=\"Full spectrum vs custom spectrum: which one to choose\">\n<meta property=\"og:description\" content=\"White full spectrum or LED with configurable red\/blue ratio? It depends on the crop. 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.art-body-sec{padding:70px 0}\n .rel-grid{grid-template-columns:1fr}\n}\n@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}*{animation:none!important}}\n<\/style>\n<!-- \u2550\u2550\u2550 BREADCRUMB \u2550\u2550\u2550 -->\n<nav class=\"breadcrumb\" aria-label=\"breadcrumb\">\n <div class=\"breadcrumb-inner\">\n <a href=\"https:\/\/www.ortoled.com\/en\/\">Home<\/a><span>\u203a<\/span>\n <a href=\"https:\/\/www.ortoled.com\/en\/blog\/\">Blog<\/a><span>\u203a<\/span>\n <span class=\"current\">Full spectrum vs custom spectrum<\/span>\n <\/div>\n<\/nav>\n<!-- \u2550\u2550\u2550 ARTICLE HERO \u2550\u2550\u2550 -->\n<section class=\"art-hero\">\n <div class=\"wrap\">\n <div class=\"rv\">\n <div class=\"art-meta\"><span class=\"art-cat\">LED guides<\/span><span>May 12, 2026<\/span><span>\u00b7 7 min read<\/span><\/div>\n <span class=\"eyebrow\">Technical glossary<\/span>\n <h1 class=\"h-md\">Full spectrum vs custom spectrum: which one to choose<\/h1>\n <p class=\"lead\">White full spectrum or LED with configurable red\/blue ratio? It depends on the crop. Here’s how to choose without getting it wrong.<\/p>\n <\/div>\n <div class=\"art-hero-img rv\" data-d=\"1\"><img decoding=\"async\" src=\"https:\/\/www.ortoled.com\/wp-content\/uploads\/2026\/07\/ortoled-dettaglio-barra-s-line-hl-150w-02.png\" alt=\"Light spectrum of a full spectrum LED grow light\" loading=\"eager\"><\/div>\n <\/div>\n<\/section>\n<!-- \u2550\u2550\u2550 ARTICLE BODY \u2550\u2550\u2550 -->\n<section class=\"art-body-sec\">\n <div class=\"wrap\">\n <div class=\"art-layout\">\n <article class=\"art-content rv\">\n <p>Every now and then a grower asks me whether white full spectrum is just a marketing choice or actually makes a difference compared to the old red and blue panels. The short answer is that it depends on what you’re growing and how much you want to simplify your life.<\/p>\n <p>The light spectrum isn’t a cosmetic detail. Every wavelength triggers different physiological responses in the plant, and understanding which ones you need at each stage lets you choose the right lamp instead of the most heavily advertised one.<\/p>\n <p>Let’s look at what changes between full spectrum and targeted red\/blue spectrum, and when one makes more sense than the other.<\/p>\n <h2 id=\"cosa-full-spectrum\">What full spectrum means<\/h2>\n <p>A full spectrum LED reproduces the entire range of photosynthetically active light, between 400 and 700 nanometers, closely matching the natural spectrum of the sun. It includes blue, green, yellow, orange and red in a single balanced emission, like in the <a class=\"inline-link\" href=\"https:\/\/www.ortoled.com\/ortoled-eco-full-spectrum\/\">ORTOLED ECO Full Spectrum<\/a> range.<\/p>\n <!-- Link a pagina prodotto: nessuna versione EN confermata esistente, mantenuto URL italiano originale -->\n <p>The main advantage is versatility: the same lamp covers both vegetative and flowering well, without needing to change fixture or manually adjust channels.<\/p>\n <h2 id=\"blu-rosso\">Blue and red: the role of each wavelength<\/h2>\n <p>Blue light, between 400 and 500 nanometers, builds compact, sturdy plants. It stimulates lateral branching and keeps internodes short, an effect that’s highly sought after during the vegetative stage.<\/p>\n <p>Red light, between 600 and 700 nanometers, triggers flowering hormones and supports the development of flowers and fruit. Too much blue at this stage can even push the plant toward unwanted vegetative behavior.<\/p>\n <h2 id=\"vegetativa-fioritura\">Vegetative and flowering: when the need changes<\/h2>\n <p>During vegetative growth, a balanced spectrum with a slight prevalence of blue works best, with a color temperature indicatively between 4000K and 5500K, to favor leaves and compact structure.<\/p>\n <p>During flowering, the spectrum needs to become richer in red, with a color temperature between 3000K and 4000K, and a red-to-blue ratio that many growers set between 2:1 and 3:1 to maximize the floral response.<\/p>\n <table class=\"cmp-table\">\n <tbody>\n <tr><td>Vegetative \u2014 color temperature<\/td><td>4000\u20135500K<\/td><\/tr>\n <tr class=\"cmp-top\"><td>Flowering \u2014 color temperature<\/td><td>3000\u20134000K<\/td><\/tr>\n <tr><td>Flowering \u2014 recommended red:blue ratio<\/td><td>2:1 \u2013 3:1<\/td><\/tr>\n <\/tbody>\n <\/table>\n <p class=\"cmp-note\">Indicative ranges for most high light-demand indoor crops<\/p>\n <h3>Full spectrum or targeted red\/blue: which one wins<\/h3>\n <p>Studies on crops such as lettuce show denser, more vibrant leaves with full spectrum light compared to red\/blue panels alone, partly thanks to the green component, which improves light penetration into the lower canopy.<\/p>\n <p>Targeted red\/blue panels remain energy-efficient and useful as targeted supplementation, but on their own they don’t cover all the wavelengths needed for the plant’s overall health over the long term.<\/p>\n <h2 id=\"risposta-breve\">Full spectrum in one sentence<\/h2>\n <div class=\"snippet-box\">\n <p>Full spectrum reproduces the entire 400-700nm range of sunlight in a single lamp, suitable for both vegetative and flowering without needing to change fixture. Targeted red\/blue spectrum is more efficient for a single stage but requires more attention and often more lamps to cover the entire cycle.<\/p>\n <\/div>\n <p>For most indoor growers, full spectrum remains the simplest and safest choice: one lamp, the whole cycle, without having to guess the perfect ratio every time you change stage.<\/p>\n <\/article>\n <aside class=\"art-side rv\" data-d=\"2\">\n <div class=\"side-widget\">\n <div class=\"side-title\">In this article<\/div>\n <ul class=\"side-toc\">\n <li><a href=\"#cosa-full-spectrum\">What full spectrum is<\/a><\/li>\n <li><a href=\"#blu-rosso\">Blue and red compared<\/a><\/li>\n <li><a href=\"#vegetativa-fioritura\">Vegetative and flowering<\/a><\/li>\n <li><a href=\"#risposta-breve\">The short answer<\/a><\/li>\n <\/ul>\n <\/div>\n <div class=\"side-widget\">\n <div class=\"side-title\">Tags<\/div>\n <div class=\"side-tags\">\n <span class=\"side-tag\">Full spectrum<\/span>\n <span class=\"side-tag\">Light spectrum<\/span>\n <span class=\"side-tag\">Color temperature<\/span>\n <span class=\"side-tag\">Flowering<\/span>\n <\/div>\n <\/div>\n <\/aside>\n <\/div>\n <\/div>\n<\/section>\n<!-- \u2550\u2550\u2550 FAQ \u2550\u2550\u2550 -->\n<section class=\"sec tint\">\n <div class=\"wrap\">\n <div class=\"sec-head rv\">\n <span class=\"eyebrow\">Frequently asked questions<\/span>\n <h2 class=\"h-md\">Still have doubts about spectrum?<\/h2>\n <\/div>\n <div class=\"faq-wrap rv\" data-d=\"1\">\n <details class=\"fitem\"><summary>Do I need to change lamp between vegetative and flowering?<span class=\"pm\"><\/span><\/summary><div class=\"ans\">With a full spectrum lamp, no \u2014 generally the same emission covers both stages well. Some fixtures with per-channel dimmers also let you shift the balance slightly toward red during flowering.<\/div><\/details>\n <details class=\"fitem\"><summary>Does too much blue during flowering really cause harm?<span class=\"pm\"><\/span><\/summary><div class=\"ans\">An excess of blue during flowering can interfere with the hormonal signals that trigger flower formation, pushing the plant toward behavior more typical of the vegetative stage. It’s not permanent damage, but it slows down the floral response.<\/div><\/details>\n <details class=\"fitem\"><summary>Does the green light in the spectrum actually serve a purpose?<span class=\"pm\"><\/span><\/summary><div class=\"ans\">Yes. Even though plants reflect more green than red and blue, this component penetrates the canopy better and reaches the lower leaves, contributing to photosynthesis deeper in the canopy.<\/div><\/details>\n <details class=\"fitem\"><summary>How do I know if a lamp is truly full spectrum?<span class=\"pm\"><\/span><\/summary><div class=\"ans\">Look for the spectrum graph in the manufacturer’s datasheet. It should show a continuous curve between 400 and 700 nanometers, with no obvious gaps, not just two isolated peaks on red and blue.<\/div><\/details>\n <\/div>\n <\/div>\n<\/section>\n<!-- \u2550\u2550\u2550 ARTICOLI CORRELATI \u2550\u2550\u2550 -->\n<section class=\"sec\">\n <div class=\"wrap\">\n <div class=\"related-header rv\">\n <h2 class=\"h-md\">Keep reading<\/h2>\n <a href=\"https:\/\/www.ortoled.com\/en\/blog\/\">See all articles \u2192<\/a>\n <\/div>\n <div class=\"rel-grid\">\n <!-- Articoli correlati: nessuna versione EN confermata esistente per questi 3 articoli, mantenuti i link italiani originali -->\n <a class=\"rel-card rv\" href=\"https:\/\/www.ortoled.com\/blog\/ppfd-dli-coltivazione\/\">\n <div class=\"rel-media\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"4\"><\/circle><path d=\"M12 2v2M12 20v2M2 12h2M20 12h2\"><\/path><\/svg><\/div>\n <div class=\"rel-cat\">LED Guides<\/div>\n <h3>PPFD and DLI: the two values that determine your harvest<\/h3>\n <p>Without understanding PPFD and DLI you’re growing blind. A complete guide with practical examples.<\/p>\n <\/a>\n <a class=\"rel-card rv\" data-d=\"1\" href=\"https:\/\/www.ortoled.com\/blog\/efficienza-led-grow-light\/\">\n <div class=\"rel-media\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"22 12 18 12 15 21 9 3 6 12 2 12\"><\/polyline><\/svg><\/div>\n <div class=\"rel-cat\">LED Guides<\/div>\n <h3>\u00b5mol\/J explained simply: how to choose an efficient LED lamp<\/h3>\n <p>Photon efficiency is the most important parameter when choosing a lamp. A complete guide with real data.<\/p>\n <\/a>\n <a class=\"rel-card rv\" data-d=\"2\" href=\"https:\/\/www.ortoled.com\/blog\/distanza-lampade-led\/\">\n <div class=\"rel-media\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12 2v20M2 12h20\"><\/path><\/svg><\/div>\n <div class=\"rel-cat\">Cultivation<\/div>\n <h3>How far should LED lamps be from your plants?<\/h3>\n <p>Distance affects PPFD, leaf temperature and light uniformity. Here are the practical rules.<\/p>\n <\/a>\n <\/div>\n <\/div>\n<\/section>\n<!-- \u2550\u2550\u2550 CTA FINALE \u2550\u2550\u2550 -->\n<section class=\"final tint\">\n <div class=\"wrap rv\">\n <span class=\"eyebrow\">Get started now<\/span>\n <h2 class=\"h-md\">Ready to switch to<br>professional LED?<\/h2>\n <p>Discover the ORTOLED range \u2014 lamps with Samsung chips tested for yield, efficiency and durability.<\/p>\n <div class=\"hero-ctas\">\n <a class=\"btn btn-solid\" href=\"https:\/\/www.ortoled.com\/en\/shop\/\">See all products<svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M5 12h14M13 6l6 6-6 6\"><\/path><\/svg><\/a>\n <\/div>\n <\/div>\n<\/section>\n<script>\n(function(){\n var io=new IntersectionObserver(function(es){es.forEach(function(e){if(e.isIntersecting){e.target.classList.add('in');io.unobserve(e.target);}});},{threshold:.12,rootMargin:'0px 0px -8% 0px'});\n document.querySelectorAll('.rv').forEach(function(el){io.observe(el);});\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Full spectrum vs custom spectrum: which one to choose | ORTOLED Home\u203a Blog\u203a Full spectrum vs custom spectrum LED guidesMay<\/p>\n","protected":false},"author":1,"featured_media":3171,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[157],"tags":[],"class_list":["post-3172","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-led-guides"],"_links":{"self":[{"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/posts\/3172","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/comments?post=3172"}],"version-history":[{"count":1,"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/posts\/3172\/revisions"}],"predecessor-version":[{"id":3173,"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/posts\/3172\/revisions\/3173"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/media\/3171"}],"wp:attachment":[{"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/media?parent=3172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/categories?post=3172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ortoled.com\/en\/wp-json\/wp\/v2\/tags?post=3172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}