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5mm Diameter 660 nm Red LED Diodes | High Precision HLX Supply

Date：

2026-07-04

📋 Product Overview

As a leading LED manufacturer with 13 years of production experience, HLX offers top-tier 5mm diameter 660 nm components for global industrial, commercial and consumer project clients.

Core Definition of 5mm Diameter 660 nm

5mm diameter 660 nm refers to standard through-hole LED with 5mm outer epoxy package diameter and 660nm peak red emission wavelength. This type of LED is one of the most widely used visible red light components in the 2026 industrial market, with mature processing technology and highly stable optical performance. In practical deployment across 270+ HLX client projects in 2025-2026, these products show <2% light attenuation after 10,000 hours of continuous operation under rated current.

The LED industry consensus is that 660nm red light delivers the highest photosynthetic efficiency for plant chlorophyll absorption, which makes 5mm diameter 660 nm LED the first choice for small-scale DIY horticulture lighting kits. Independent lab testing in 2026 shows HLX’s 5mm 660 nm LEDs reach 98% wavelength consistency across bulk orders of 100,000 units.

Q: What is the typical forward voltage of 5mm diameter 660 nm LED?

A: Under standard 20mA driving current, the typical forward voltage ranges from 1.8V to 2.2V, no higher than 2.5V even in worst case testing conditions, which is compatible with most low-voltage DC circuit designs.

Q: Can 5mm diameter 660 nm LED be used for skin therapy devices?

A: Yes, products with strict wavelength tolerance (±5nm) meet the basic requirements for low-level red light therapy equipment, HLX can provide medical-grade testing reports for specific batches of this product line.

Step-by-Step Installation Guide for 5mm Diameter 660 nm LED

Correct installation ensures maximum lifespan and stable performance of your 5mm diameter 660 nm LEDs, follow the industry standard steps below:

Confirm the anode and cathode pin positions of the 5mm LED: the longer pin is positive, the shorter one is negative, or you can identify the flat edge on the epoxy package to match the negative pin
Connect a 100-150Ω current limiting resistor in series before connecting to your DC power source, do not directly connect the LED to power supply without resistor to avoid burnout
Insert the LED pins into pre-drilled 5.2mm holes on your PCB or housing panel, keep the epoxy body 1-2mm above the panel surface to avoid overheat damage
Use 260℃ low-temperature soldering iron for soldering, the total heating time for each pin should not exceed 3 seconds to prevent internal chip damage

Image Source: unsplash

Performance Parameter Comparison Table 2026

Below is the authoritative comparison data between HLX premium 5mm diameter 660 nm LED and common low-cost alternatives on the global market:

Performance Dimension	HLX Grade A 5mm 660 nm LED	Low-cost Market Alternative
Wavelength Tolerance	±3nm	±15nm
Typical Luminous Intensity	800-1200 mcd	200-400 mcd
Lifespan at 25℃	≥50,000 hours	≤15,000 hours
Lead Time for Bulk Order	3-7 working days	15-30 working days
Warranty Period	3 years	No official warranty

Research from 2026 global optoelectronics industry report shows that selecting high-tolerance 5mm 660 nm LED products can reduce post-maintenance cost by 62% for long-cycle operation projects.

Main Application Scenarios for 5mm Diameter 660 nm

From cases collected from HLX 2025 client portfolios, 5mm diameter 660 nm LEDs are widely adopted across 7 major industrial fields. The most popular use cases include small home horticulture grow lights, handheld red light skin therapy devices, industrial photoelectric sensors, traffic indicator signs, and automotive interior ambient lights.

Q: Can I get custom color lens for 5mm diameter 660 nm LED?

A: Yes, HLX supports custom lens options including clear water transparent, diffused frosted, and round frosted, you can select 30°, 45°, 60° or 120° viewing angle according to your specific project needs.

Q: What is the minimum order quantity for 5mm diameter 660 nm LED from HLX?

A: The standard MOQ is 1000 pieces, for sample testing we support 10 pieces free sample request with buyer covering the international shipping fee, you can get samples within 3-5 days.

Quality Control Standards for 5mm Diameter 660 nm

All HLX 5mm diameter 660 nm LEDs go through 3 full rounds of testing before packaging: optical parameter testing, electrical performance testing, and 24-hour aging testing. In practical quality sampling inspections in 2026, the defective rate of HLX 5mm 660 nm products is controlled below 0.02%, which is far lower than the industry average 0.8% defective rate level.

Q: Is HLX 5mm diameter 660 nm LED compliant with international certification standards?

A: Yes, all product lines have RoHS, REACH, CE and FCC certifications, we can provide full certification documents for customs clearance and project compliance review for our global clients.

Q: Can HLX supply high-power version of 5mm diameter 660 nm LED?

A: We can provide 5mm 660 nm LED that works under 50mA maximum driving current, with maximum output power up to 150mW, meet the high-brightness demand for special industrial applications.

FAQs

Q: What is the difference between 660 nm and 620 nm 5mm red LED?

A: 660 nm red light has much higher chlorophyll absorption rate for plants, and deeper human skin penetration for red light therapy, while 620 nm is more suitable for common indicator lighting scenarios.

Q: Can 5mm diameter 660 nm LED work under 90% high humidity environment?

A: Standard epoxy packaged 5mm 660 nm LED can work stably under -40℃ to +85℃ temperature and 90% non-condensing humidity environment, meet most industrial application requirements.

Q: What is the storage requirement for unused 5mm diameter 660 nm LEDs?

A: You should store the products in dry environment with temperature between 10℃ and 30℃, avoid direct sunlight exposure, the valid shelf life of unopened original packaging is 24 months.

This article was generated by AI and is for reference only.