Guangdong Auma Agriculture
English
You are here: Home » Blog » LED Plant Grow Light » Guide To Choosing Plant Grow Lights: Full Spectrum Vs. Red-Blue Light

Guide To Choosing Plant Grow Lights: Full Spectrum Vs. Red-Blue Light

Views: 0     Author: Site Editor     Publish Time: 2025-05-26      Origin: Site

Inquire

facebook sharing button
twitter sharing button
line sharing button
wechat sharing button
linkedin sharing button
pinterest sharing button
whatsapp sharing button
sharethis sharing button

I. Spectral Principles and Core Functions of Plant Grow Lights

In modern agriculture and home gardening, plant grow lights have become core devices for overcoming light limitations. Whether in greenhouses with continuous rain or indoor spaces with insufficient sunlight, these lighting tools precisely regulate plant photosynthesis, morphological development, and secondary metabolism by simulating the spectral energy distribution of sunlight. Data shows that reasonable use of grow lights can increase leafy vegetable yields by 40%-60% and shorten the coloration cycle of succulents by over 50%. The core secret lies in the "light codes" of different spectra.

grow light                                                   plant light

(A) Physiological Significance of Spectral Bands

  1. Red Light (600-700nm): The 'Start Button' for Flowering and Fruiting
    Red light regulates photoperiod responses by influencing phytochrome in plants. For example, tomatoes irradiated with red light show lower flowering nodes and a 35% increase in single-plant fruit set rate; strawberries treated with 660nm peak red light have a 2.3-degree increase in fruit sugar content. AUMABIO full-spectrum lights have a red light proportion of 35% and achieve precise output with a half-peak width <20nm, avoiding energy dispersion caused by wide-band red light.
  2. Blue Light (400-500nm): The 'Shaper' for Stem and Leaf Growth
    Blue light regulates leaf expansion, stomatal opening, and chloroplast movement through cryptochrome. Lettuce under 450nm blue light has an 18% increase in leaf thickness and a 22% increase in vitamin C content; succulents lacking blue light can have stem node spacing stretched to 2.5 times that of normal plants, showing obvious leggy growth. The blue light proportion in AUMABIO red-blue light series reaches 12.5%-16.7% (red:blue=6:1-9:1), paired with  PAR-S technology to balance light intensity distribution and avoid leaf burning caused by excessive local blue light.
  3. Full Spectrum (400-800nm): The 'Simulator' for Natural Growth
    Sunlight contains continuous spectra such as ultraviolet (UV), visible light (Vis), and infrared (IR). Among them, UV-A/B can induce plants to synthesize antioxidants like flavonoids, while IR participates in temperature perception and morphogenesis. AUMABIO full-spectrum pink light tubes control UV-A (320-400nm) at 3% and IR (700-800nm) at 15% through  composite spectral technology, simulating the complexity of natural light while avoiding the burning risks of traditional UV lamps.

(B) AUMABIO's Technical Breakthrough: From 'Light Supplementation' to 'Light Regulation'

Traditional red-blue light lamps often cause unbalanced plant growth due to single-spectrum limitations. For example, cucumbers under high red light ratios are prone to "pointed melons," and lettuce under high blue light ratios bolts prematurely. Through years of field trials, AUMABIO has established a spectral database covering 50+ crops, and its T8 series full-spectrum lights achieve:


  • Seedling Stage: 30% blue light + UV band promotes root cell division, increasing strawberry seedling root length by 42% compared to control groups;

  • Flowering Stage: 45% red light + far-red light (730nm) induces tomato flower bud differentiation, increasing single-plant flower count by 28%;

  • Fruiting Stage: Red light + IR band 协同 accelerates grape color change, increasing anthocyanin synthesis efficiency by 65%.

II. Full Spectrum vs. Red-Blue Light: Core Differences and Application Scenarios

(A) Essential Differences in Spectral Structure

Dimension Red-Blue Plant Light Full-Spectrum Plant Light
Spectral Composition Only red light (660nm) and blue light (450nm) 400-800nm continuous spectrum, including UV/IR
Light Color Purple-pink (lower visual comfort) Natural light-like (color temperature 4000-4200K)
Energy Distribution Concentrated in photosynthetically active radiation (400-700nm) Balanced distribution across all bands, total energy increased by 15%
Spectral Adjustability Fixed red-blue ratio (requires advance customization) Supports band fine-tuning (e.g., increasing green light proportion)


Case Comparison: In a succulent plant light supplementation experiment, the red-blue light (8:1) treatment increased anthocyanin content in Sedum rubrotinctum by 83.2% within 28 days, but leaf thickness decreased by 12% (due to insufficient blue light causing excessive cell elongation); the same variety treated with full-spectrum purple-pink light saw a 78% increase in anthocyanin content and a 9% increase in leaf thickness, achieving a dual optimization of "coloration + shape control."

(B) Scenario-Based Selection Guide: Precise Matching from Home to Greenhouse

1. Home Gardening: Balance of Aesthetics and Functionality

  • Typical Scenarios: Indoor succulent platters, balcony vegetable planters, indoor green corners

  • Core Needs:

    • Natural light color without affecting interior decoration (red-blue light's purple-pink may cause visual fatigue);

    • Multi-purpose use compatible with mixed planting of succulents, herbs, and foliage plants;

    • Low power consumption, easy installation, no professional knowledge required.

  • AUMABIO Recommended Solution:

    • 600mm Full-Spectrum Pink Light Single Row (9W): Suitable for spaces within 3㎡, with an irradiation distance of 10-15cm and 8-10 hours of daily light supplementation, meeting the needs of 5-8 succulent pots + 2-3 leafy vegetable pots.

    • Hidden Installation Tips: Fix the tube under curtain rods or shelves with black zip ties, softening the light through a PC UV-proof lampshade to avoid direct eye exposure.

2. Small Greenhouses/Big Sheds: Balance of Cost-Effectiveness and Professionalism

  • Typical Scenarios: Strawberry picking gardens, flower seedling sheds, organic vegetable planting areas

  • Core Needs:

    • Precise spectra optimized for red-blue ratios for single crops;

    • High cost-effectiveness, controllable initial investment and later electricity costs;

    • Strong durability, adapting to high humidity and dusty environments.

  • AUMABIO Recommended Solution:

    • 900mm Red-Blue Double Row (24W, red:blue=8:1): Install 80-100 units per mu (667㎡), paired with a timer for a 14-hour light/10-hour dark cycle, increasing strawberry single fruit weight by 22% and reducing deformed fruit rate by 40%.

    • Energy Saving Optimization: Using constant current drive technology, power stability error is <1% under ±10% voltage fluctuations, saving about 2000 yuan/year in electricity costs compared to traditional halogen lamps.

3. Professional Planting/Research Scenarios: Spectral Customization and Precise Control

  • Typical Scenarios: Succulent greenhouses (coloration and shape control), tissue culture laboratories (virus-free seedling cultivation), high-end fruit and vegetable planting (e.g., cherry tomatoes)

  • Core Needs:

    • Customizable spectra supporting specific band enhancement (e.g., UV-B for anthocyanin promotion, far-red for seed dormancy breaking);

    • Data-driven management providing professional parameters like PPFD/spectral distribution maps;

    • Modular design for easy integration with intelligent greenhouse systems.

  • AUMABIO Custom Solutions:

    • Special Purple-Pink Spectrum for Succulent Coloration: Enhances 450nm blue light (28% proportion) and 660nm red light (52% proportion), paired with 5% UV-A, turning Pachyphytum oviferum leaves from green to pink within 21 days with uniform coloration.

    • Special Full Spectrum for Tissue Culture Seedlings: Removes the UV band and increases 525nm green light (20% proportion), promoting pseudobulb expansion in Dendrobium officinale tissue culture seedlings with a 1.5x increase in proliferation coefficient.

III. Five Core Advantages of AUMABIO Full-Spectrum LED Plant Grow Lights: Redefining Light Supplementation Standards

(A) Spectral Precision: From 'Broad Spectrum Coverage' to 'Targeted Regulation'

Traditional full-spectrum lights often have inefficient light supplementation due to uneven spectral energy distribution, such as insufficient 400-500nm blue light affecting leafy vegetable quality. AUMABIO optimizes band ratios for different crop needs through spectral simulation algorithms:


  • Leafy Vegetables (e.g., lettuce): Blue light proportion increased to 30%, with enhanced 550nm green light (18% proportion), promoting photomorphogenesis and a 35% increase in leaf vitamin K content;

  • Flowering-Fruiting Crops (e.g., chili peppers): Red light proportion 40% + far-red light (730nm, 8% proportion), shortening flowering induction period by 7 days and increasing single-plant fruit count by 19%;

  • Succulents: Purple-pink spectrum (400-480nm blue light + 600-700nm red light as main components) increases anthocyanin synthase activity by 72% and speeds up coloration by 50%.


Technical Support: Adopts  dual-chip integration technology (red-blue light chip + full-spectrum chip), achieving adjustable band energy through independent drive circuits to avoid spectral fixation defects of single chips.

(B) Energy Efficiency Revolution: 9W Tube Illuminates 0.3㎡, Saving Over 100 Yuan in Annual Electricity Costs

  • Power and Light Efficiency Balance: Take the 600mm single-row tube as an example, the 9W full-spectrum light has a photosynthetic photon flux (PPF) of 18μmol/s, equivalent to 2.3 times that of traditional 25W fluorescent lamps, with only 36% of the energy consumption. Calculated at 10 hours of daily use, annual power consumption is only 32.85 kWh, costing about 16.4 yuan (at 0.5 yuan/kWh), saving about 38 yuan/year compared to traditional lamps.

  • Heat Dissipation Black TechnologyAviation aluminum profile casing (1.2mm thickness) with micro-groove heat dissipation structure keeps LED junction temperature within 65℃ (industry standard ≤85℃), reducing light decay rate by 50% at the same power, with >90% light flux retention after 5 years.

(C) Durability Upgrade: From 'Disposable Items' to 'Durable Goods'

  • Core Component Lifespan:

    • LED Beads: Uses Jinyuan 2835 package chips with light decay <3%/1000 hours, maintaining 80% of initial brightness after 50,000 hours (common chips only 50%);

    • Driver Power Supply: Built-in EMC filter circuit, passing 1000V surge tests, adapting to unstable rural power grids;

    • Lampshade: Three-layer co-extruded PC material with >98% UV blocking rate, non-yellowing and non-cracking after long-term use.

  • Warranty Policy: Industry-first "three-year full free warranty", free replacement for non-human damage, reducing planters' worries.

(D) User-Friendly Design: Transformation from 'Professional Equipment' to 'Home-Friendly'

  • Installation-Free Threshold:

    • Accessories include stainless steel clips, zip ties, and series connection wires, allowing suspension or magnetic installation without tools;

    • Series connection mode supports cascading up to 10 tubes, requiring only one power interface, suitable for multi-layer balcony flower rack layouts.

  • Safety Protection:

    • Flicker-Free Design: Passes TUV certification with a flicker frequency >3125Hz, above the human eye's perception limit, avoiding interference with plant biological clocks;

    • Electric Shock Prevention Design: Insulated end caps use V0-grade flame-retardant materials, with leakage current <0.5mA in humid environments, complying with GB 7000.1 standards.

(E) Full-Cycle Services: From 'Selling Products' to 'Providing Planting Solutions'

  • Spectral Diagnosis Services: Users can submit crop varieties, growth stages, and existing light conditions, and the brand generates customized light supplementation plans through an online spectral calculator, such as:

    • Home tomato planting: Recommended red:blue=7:1 900mm single-row tube, 12 hours of daily light supplementation, divided into seedling stage (20% blue light proportion), flowering stage (50% red light proportion), and fruiting stage (red light + IR) for three-stage regulation;

    • Greenhouse phalaenopsis planting: Suggested full-spectrum pink light double-row tubes paired with 3000K warm light modules, increasing 730nm far-red light irradiation (2 hours/day) during flower bud differentiation to improve flowering uniformity by 60%.

  • Effect Tracking: Provides free PPFD measuring instrument rental services, allowing users to regularly detect light intensity, with the brand adjusting installation distance or light duration based on data to ensure maximum light supplementation effects.

IV. In-Depth Guide to Purchase Decisions: Pitfalls to Avoid and Scientific Calculations

(A) Comparison Table of Five Core Parameters

Parameter Importance Red-Blue Light Reference Values Full-Spectrum Light Reference Values Detection Methods
Spectral Coverage ★★★★★ 400-700nm (±10nm) 400-800nm (±10nm) Spectrometer measurement or request spectral diagram
PPFD (μmol/m²/s) ★★★★☆ 200-800 (15cm from light) 300-1000 (15cm from light) Photosynthetic quantum meter measurement
Power Factor ★★★☆☆ ≥0.90 ≥0.91 Check product specification sheets
Color Temperature Consistency ★★☆☆☆ Purple-pink (no strict requirements) 4000-4200K (±150K) Color temperature meter measurement or photography observation
Heat Dissipation Efficiency ★★★☆☆ Shell temperature ≤75℃ (25℃ room temp) Shell temperature ≤65℃ (25℃ room temp) Infrared thermometer detection

(B) Light Demand Calculation Formulas

  1. Basic Formula:
    Required total power (W) = Planting area (㎡) × Target PPFD (μmol/m²/s) × 0.05
    (Note: 0.05 is an empirical coefficient for AUMABIO T8 series tubes at 15cm from plants)
    Example: For 3㎡ balcony lettuce planting (target PPFD=300μmol/m²/s), total power=3×300×0.05=45W, select 5×9W single-row tubes (total 45W), evenly distributed.
  2. Light Supplementation Duration Calculation:
    Light supplementation duration (hours/day) = (Insufficient natural light hours × Target PPFD) ÷ Lamp PPFD
    Example: In winter, a certain area has only 4 hours of natural light (needs 12 hours), with an 8-hour deficit. Using a full-spectrum light with PPFD=500μmol/m²/s, supplementation duration=(8×300)÷500=4.8 hours, i.e., 5 hours of daily supplementation.

(C) Pitfall Avoidance Guide: Beware of Three Consumption Traps

  1. 'Full Spectrum' ≠ 'Sunlight Spectrum'
    Some low-cost products only mix red, blue, and green LEDs with severely broken spectra, lacking UV/IR bands, with actual light supplementation effects equivalent to red-blue lights. When purchasing, request  spectral energy distribution diagrams to confirm the continuity of key bands like 400-450nm blue light, 660nm red light, and 730nm far-red light.
  2. Power Inflation and Overhyped Light Efficiency
    Some merchants label "18W=traditional 100W" but do not specify PPFD values. You can request data on  luminous flux (lm) and  photosynthetic photon flux (PPF, μmol/s). The AUMABIO 18W double-row tube has a PPF of 36μmol/s, while a certain no-name 18W light only has 22μmol/s, with a 63% difference in actual light supplementation efficiency.
  3. Safety Hazards from Neglecting Heat Dissipation
    Low-quality plastic-shelled lamps can reach temperatures above 90℃ after 2 hours of continuous use, prone to fire hazards. AUMABIO's  aviation aluminum heat dissipation system has passed authoritative testing, maintaining a stable shell temperature of 62℃ after 12 hours of continuous operation, complying with UL94 V-0 flame-retardant standards.

VI. Conclusion: Making Light Supplementation the Core Engine for Yield and Coloration

The essence of choosing plant grow lights is to "tailor" a light environment solution for plants. There is no absolute superiority between full spectrum and red-blue light; the key lies in matching crop needs with scenario conditions:


  • Home gardening, multi-variety planting: Choose full spectrum for its "versatile" adapt

Welcome To Contact Us

We are open to questions & ideas so please connect through us by using the form bellow.

Quick Links

Product Category

Contact Us
 Building 1, Red Fuli Industrial Park, No.32-2 Shenghui North Road, Nantou Town, Zhongshan City, Guangdong Province
 +86-13316923559
aminah@aumabio.com
Copyright © 2025 Guangdong Auma Agricultural Technology Co., Ltd. All rights reserved.  Sitemap | Privacy Policy | Support By Leadong