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DP Medical
Never change another light bulb!
The Global LED is a no-maintenance, low cost, long-lasting light source. It will eliminate the inconvenience of losing light during your procedure and save you money at the same time! It is quiet (no fan), small, and remains cool; connecting directly to the microscope body – no fibre optic cable is
required for this brighter light.
- Bright, white (daylight) colour with illumination spread evenly over the field of view
- Power and intensity control at your finger tips
- Consumes less energy
- Composite and green filters available
- Retrofitable to existing Global microscopes
- Three-year warranty
Beware - Claims about light Sources
The output of a light source is only part of the story. What matters is how much of that output is concentrated on the in-focus subject. Even more important is the amount of light that makes it through the optical system back to the user. A good test for any microscope is to turn off the light source and view a non-illuminated field at different magnification levels. With the light source off, one can still clearly see an image through a Global scope. That’s because of our wide field optics. Try that with competitive scopes and the image with no light source will be much darker.
Two common terms related to light source intensity are lux and lumens. Lux: A unit of measurement of the intensity of light. One lux is equal to one lumen per square meter. Global Surgical quantifies light using lux because this value is not misleading. The lux value offered by Global accurately describes how much light is reaching the subject.
Lumen: The basic unit used to measure the flow of light, describes the amount of light emitted. This value can be misleading because it does not describe how much light is reaching the intended subject. In every system, some of the light emitted will not reach the subject and the lumen value does not account for this loss.
Another key term for comparing intensity is “spot size” or “field of illumination.” This refers to the area of the spot onto which the light is focused and measured. The larger the spot size, the more dispersed the light will be with a resulting decrease in intensity. When comparing intensity, ensure spot size where the measurement is being taken is the same. The Global LED’s intensity is approximately 50,000 lux at 250mm with a spot size diameter of 96.5mm (3.8” diameter). If we were to measure the intensity at 200mm, the spot size would be decreased, so the intensity would increase substantially.

Please contact DP Medical Systems Ltd
for further information on 020 8391 4455

