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Greenhouse Blackout Screens for Light Control

Here are **both versions shortened**:

### **Revised Meta Description (much shorter, within 145 chars):**

High-performance blackout screens that block light, improve insulation, and support photoperiod control for professional greenhouse production.

### **Product Introduction (50 words):**

Greenhouse blackout screens provide up to 99.9% light blocking for photoperiod-sensitive crops. Their reflective surface stabilizes temperature, while the breathable knitted design reduces condensation. Easy to retract, they restore full daylight when needed, delivering reliable shading, insulation, and energy efficiency for commercial growers.
  • TOP

  • Polyester, Polyolefine

  • OEM, OED

  • ISO

  • China

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Product Introduction

This double-layered blackout screen is engineered for precise day-length control, making them ideal for highly light-sensitive crops. With an aluminum or white upper surface, the screens reflect sunlight and help reduce nighttime heat loss, allowing plant temperatures to remain more stable for improved growth conditions.

Their unique knitted structure enhances breathability and minimizes condensation while allowing the screens to be folded into a compact bundle, ensuring maximum light availability when fully opened.

Providing 99.9% total light blockage, the double-layered design ensures complete blackout for crops requiring shorter day lengths than natural daylight allows. At the same time, the enhanced insulation delivers excellent energy savings, lowering winter heating costs and increasing overall benefits for growers.

Performance Features

1. Light Blocking

A blackout screen made of two-layer materials, designed for photoperiod-sensitive plants such as chrysanthemums. It provides highly effective light blocking with a light transmittance of less than 0.1%.

2. Supplemental Lighting

In greenhouses with artificial lighting systems, the white underside of the screen has a 60% reflectivity, increasing the light received by crops by 3–5%.

3. Cooling / Insulation

The aluminum foil or white surface on the upper side reflects sunlight, preventing unnecessary heat buildup while retaining warmth during the night.

4. UV Resistance & Cleanliness

Highly UV-resistant and anti-static, the product remains clean and effective even after prolonged use.

5. Prevents Condensation

The woven structure allows the shading screen to be breathable and water-permeable. When closed, humidity may slightly increase but will not form water droplets on the screen surface.

6. Space-saving

Despite being made of double-layer materials, the screen can be folded into a compact size, ensuring maximum light access to crops when opened.

Technical Specifications

blackout screen

BO99 A/B+B/B

blackout screen

BO99 A/B+B/W


Model Material

Light Transmittance

(sunny)

Light Transmittance

(cloudy)

Shading Rate Energy Saving Rate
BO99 A/B+B/B  Blackout aluminum strips, blackout strips 0.1%
0.1% 99.9% 75%
BO99 A/B+B/W  Blackout aluminum strips, white-blackout strips 0.1% 0.1% 99.9% 75%
BO99 A/A+B/B  Blackout aluminum strips, blackout strips 0.1% 0.1% 99.9% 75%
BO99 A/A+B/W  Blackout aluminum strips, white-blackout strips
0.1% 0.1% 99.9% 75%
BO99 W/B+B/B  White-blackout strips, blackout strips 0.1% 0.1% 99.9% 70%
BO99 W/B+B/W  White-blackout strips 0.1%
0.1% 99.9% 70%

Comparison with Other Screens

Comparison of Internal Greenhouse Shading Screens: White, Aluminum, Blackout

Feature  White Screen Aluminum Screen
Blackout Screen
Material & Structure Knitted polymer threads with white coating Special aluminum strips combined with transparent polymer in knitted structure Opaque knitted fabric, often polyester or PVC-based
Shading & Light Control Diffuses sunlight evenly, moderate shading Reflects sunlight efficiently, moderate to high shading depending on design Blocks nearly all light, total shading
Cooling Performance Reduces heat buildup by diffusing light Reflective aluminum strips and open knitted structure improve daytime cooling Minimal cooling effect; mainly blocks sunlight
Nighttime Energy Saving Limited heat retention Reduces heat loss from crops at night, highly energy-efficient High heat retention but can trap humidity; less breathable
Impact on Crop Growth Supports uniform growth and prevents scorching Balances cooling and heat retention, ideal for sensitive or high-value crops Suitable for dark treatment or night shading; may stress light-sensitive crops if overused
Durability & Maintenance Moderate; prone to dust accumulation Highly durable, UV-resistant, anti-static Durable, easy to clean, may fade over time
Best Applications General shading, summer cooling Energy-saving internal shading, year-round temperature control Total light blocking, dark treatment, or winter energy conservation
Cost Generally lower Moderate to high Moderate

Summary:

  • White knitted screens are ideal for moderate shading and even light diffusion, suitable for general crops.

  • Knitted aluminum screens offer the best combination of shading, cooling, and nighttime energy savings, perfect for sensitive or high-value crops.

  • Blackout knitted screens provide total light blocking, ideal for night shading or dark-treatment applications, but less effective for daytime cooling.

Applications in Greenhouse Cultivation

1. Photoperiod Control

Ideal for photoperiod-sensitive crops such as chrysanthemums, poinsettias, kalanchoes, cannabis, and other ornamentals requiring strict short-day conditions to initiate flowering.

2. Light Pollution Management

Suitable for greenhouses using artificial grow lights, preventing external light from entering and internal light from escaping to avoid disruption of crop growth cycles.

3. Energy-Saving Climate Control

Used in climate-controlled greenhouses to enhance insulation, reduce winter heating costs, and maintain stable temperatures for more efficient crop production.

4. Propagation & Young Plant Production

Helps protect seedlings and young plants from excess light while maintaining a controlled microclimate.

5. Research & Specialty Cultivation

Applied in research facilities, breeding centers, and high-precision growing environments that require reliable blackout performance and consistent climate regulation.

Manufacturing & Quality Control

Production Process

Every roll of the Transparent Diffuse Energy-Saving Screen is produced in a fully automated weaving and lamination facility. The production process emphasizes consistency and precision—each batch undergoes strict quality checks for material integrity, shading accuracy, and tensile strength. Our in-house testing ensures that every product meets international greenhouse standards for durability, energy performance, and light transmission.

greenhouse screen

Warpping

greenhouse screen

Knitting

greenhouse screen

Testing

greenhouse screen

Packing

Climate Screen Testing Equipment

By combining these testing tools, we guarantee that each climate screen meets strict quality standards for energy efficiency, light management, durability, and UV resistance, providing growers with reliable and consistent greenhouse solutions.

Equipments

To ensure the highest quality and performance of our climate screens, we utilize advanced testing equipment to evaluate all critical aspects of the material:

Thermal Insulation Tester

Measures heat retention and energy-saving efficiency under simulated greenhouse conditions, ensuring optimal performance in both summer and winter.

Light Spectrum Analyzer

Analyzes light transmission, diffusion, and spectral distribution to verify that the screen provides uniform illumination and protects crops from excessive radiation.

Tensile Testing Machine

Assesses the mechanical strength and durability of the screen, including warp and weft resistance, elongation, and load capacity.

UV Aging Tester

Simulates long-term UV exposure to evaluate material degradation, color stability, and performance over time.


Video Showcase

Brochure Download 

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FAQs

1. What is a blackout screen used for in a greenhouse?

A blackout screen is used to control the photoperiod by completely blocking external light, enabling growers to create short-day or long-night conditions for sensitive crops.

2. Which crops require blackout screens?

They are commonly used for chrysanthemums, poinsettias, kalanchoes, cannabis, and other ornamentals or specialty crops that rely on strict day-length regulation to trigger flowering.

3. How much light do blackout screens block?

Double-layered blackout screens provide up to 99.9% light blockage, ensuring total blackout conditions.

4. What is the benefit of the aluminum or white upper surface?

The aluminum or white surface reflects sunlight during the day and reduces heat loss at night, helping maintain a stable plant temperature and improving energy efficiency.

5. Do blackout screens help save energy?

Yes. Their insulating properties reduce heat loss in winter, helping growers lower heating costs and improve overall greenhouse climate efficiency.

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