90mm 42pcs Bottom LED Light Source Stereo Microscope AM-42-90
The AM-42-90 is a 90mm diameter bottom-mounted LED ring light with 42 individual LED patch light-emitting tubes, designed to provide uniform, adjustable illumination for stereo microscopes.

Product Overview
The AM-42-90 is a 90mm diameter bottom-mounted LED ring light with 42 individual LED patch light-emitting tubes, designed to provide uniform, adjustable illumination for stereo microscopes. It operates on AC 90-265V input and delivers DC24V at 3.6W output, with a white light color temperature of 6400K. The light source features 0 to 100% linear dimming for precise brightness control, and its 69mm diameter lighting area fits standard microscope stages. The unit has a rated LED life exceeding 100,000 hours, ensuring long-term reliability in inspection and teaching environments.
- Input voltageAC 90-265V, 50/60Hz
- Output voltageDC24V
- Output power3.6W
- LED life>100000 hours
- Luminous colorWhite light 6400K
- Brightness adjustment0~100% linear dimming
Key Benefits
- 42 LED patch tubes deliver even illumination across a 69mm diameter lighting area
- 0~100% linear dimming allows fine control of brightness for different sample types
- 6400K white light provides neutral color rendering for accurate inspection
- 90mm overall diameter fits standard microscope stages with no interference
- DC24V output at 3.6W ensures stable, low-heat operation during extended use
- LED life exceeds 100,000 hours, reducing replacement frequency and downtime
Application Scenarios
- Uniform lighting for PCB inspection under a stereo microscope in electronics rework
- Consistent illumination during biological specimen observation in teaching labs
- Adjustable brightness for delicate samples in gemmology or mineralogy labs
- Stable lighting during long-duration quality checks in metallurgical or foundry labs
- Use in precision assembly workshops where shadow-free illumination is critical
Who It Is For
- Electronics manufacturers performing SMD and BGA inspection and rework
- Teaching laboratories in schools and universities using stereo microscopes
- Clinical, veterinary and research labs requiring consistent illumination
- Metallurgy and heat-treatment quality control departments
- Jewellery and watchmaking workshops needing shadow-free lighting
Problems It Solves
- Uneven lighting from older halogen or incandescent ring lights causes glare and shadow
- Fixed brightness settings prevent adaptation to different sample reflectivity
- Short LED lifespan in low-cost ring lights increases maintenance and replacement costs
- Incompatible diameter or mounting interface prevents fit on standard microscope stages
- High heat output from traditional lights damages sensitive samples or affects focus
Technical Features
- Bottom-mounted LED ring light with 42 individual patch LED tubes
- Input voltage: AC 90-265V, 50/60Hz
- Output: DC24V, 3.6W
- Luminous color: white light, 6400K
- Brightness adjustment: 0~100% linear dimming
- Lighting area: diameter 69mm
- Overall diameter: 90mm
- LED life: >100,000 hours
- Low heat output due to DC24V operation
- Designed for direct mounting on standard stereo microscope stages
Specifications
| Input voltage | AC 90-265V, 50/60Hz |
|---|---|
| Output voltage | DC24V |
| Output power | 3.6W |
| LED life | >100000 hours |
| Luminous color | White light 6400K |
| Brightness adjustment | 0~100% linear dimming |
| Number of LED patch tubes | 42 pieces |
| Lighting area size | Diameter 69MM |
| Overall dimensions | Diameter 90MM |
Specifications are taken from the AMADA product data for this item. Confirm critical dimensions with us in writing before ordering.
Use Guide
- Mount the AM-42-90 directly onto the standard microscope stage with compatible threading or clamping
- Ensure the input voltage matches the local supply (AC 90-265V) before connecting
- Adjust brightness gradually from 0% to 100% to avoid sudden light spikes
- Use the 6400K white light for accurate color representation in inspection and documentation
- Avoid covering the LED surface with dust or debris to maintain even illumination
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View DetailsFrequently Asked Questions
What is the input voltage range for this LED light source?
AC 90-265V, 50/60Hz. It supports global mains voltage without needing a transformer.
Can I use this light source with any stereo microscope?
It fits standard microscope stages with a 90mm diameter mounting surface. Confirm the stage interface before mounting.
What is the color temperature of the light?
6400K white light, providing neutral illumination suitable for inspection and photography.
Does the brightness adjustment work linearly?
Yes. The dimming is 0~100% linear, allowing smooth and predictable brightness control.
How long is the expected LED lifespan?
Over 100,000 hours, which equates to more than 11 years of continuous use at 8 hours per day.
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