Lambda TLED / TLED+
LED Transmitted Light Source

The Lambda TLED and TLED+ are stand-alone LED light sources that can be used with the transmitted light path of a microscope or in other applications with similar requirements.

The basic system consists of an LED mounted on a special black-anodized aluminum heat sink and a controller. Both TLED and TLED+ controllers are powered by a rugged modular universal power supply. The controllers provide intensity control and on-off control via a toggle switch or TTL logic. The on-off time is < 25 µsecs when using TTL control. In addition to digital input control, the Lambda TLED+ has an analog input to modulate the LED intensity. The Lambda TLED and TLED+ are expected to have stable output that will last in excess of 50,000 hours.

The Lambda TLED and TLED+ can be ordered with a high-output white light LED making it a suitable light source for contrast methods including Phase and Differential Interference Contrast (DIC).

As an alternative to the standard white-light LED, we have several options available including an IR-LED which is suitable for experiments requiring IR-DIC. Please contact Sutter for details.

Our dual channel Lambda TLED+ option combines two high power LEDs into a single light path. The TLED-DC includes a 460 nm LED for stimulation, while the second channel passes the phosphor emission from a white light LED. The white light channel can be used to access spectra between 510 nm to 630 nm and is suitable for a variety of applications. Both channels are driven by individual TLED+ controllers and can be triggered, also individually, by a TTL signal. Alternate wavelength configurations are available.

Each Lambda TLED/TLED+ system includes an optical mounting adapter for the microscope and detailed installation instructions. Mounting adapters are designed to fit most models of Nikon, Olympus, Zeiss and Leica microscopes. Custom adapters for the Lambda TLED/TLED+ are available at an additional cost.

The TLED-RL is a ring light illuminator for stereo microscopes with lenses up to 65 mm in outside diameter. The ring light is composed of a circular assembly of many white light LEDs that provide even and direct illumination of the sample.

  • > 50,000 hour lifetime
  • < 25 µsecs ON-OFF time
  • TTL control (with polarity switch)
  • Very stable output
  • Compact stand-alone design
  • Easy installation
  • Transmitted light
  • Phase Contrast
  • Differential Interference Contrast (DIC)


Output Range
White light (400 nm - 700 nm)

Noise/Short term stability

LED Life
> 50,000 hours

Control Box Dimensions
3 in x 3.5 in x 4.1 in | 7.6 cm x 8.9 cm x 10.2 cm
4 in x 3.25 in x 4.1 in | 10.2 cm x 8.3 cm x 10.2 cm

2.2 lbs | 1.0 kg

120/240 Volts
50/60 Hertz power line
75 Watts max

US Prices > Lambda TLED / TLED+
International prices vary by country due to associated importation costs. Please contact your local distributor or Sutter Instrument for a quotation. Prices subject to change without notice.

LAMBDA TLED Single Channel LED Light Source
Includes Lambda TLED light source, TLED controller, white light LED and power supply
Catalog Number Description Price
TLED-N Lambda TLED for Nikon $2,015
TLED-N40 Lambda TLED for Nikon E400/E600 $2,015
TLED-N50 Lambda TLED for Nikon AZ100 $2,015
TLED-N65 Lambda TLED for Nikon FN1 $2,015
TLED-Y Lambda TLED for Olympus $2,015
TLED-Z Lambda TLED for Zeiss $2,015
TLED-L Lambda TLED for Leica $2,015
TLED-C Lambda TLED for C-mount $2,015

LAMBDA TLED+ Single Channel LED Light Source
Includes Lambda TLED+ light source, TLED+ controller, white light LED and power supply
Catalog Number Description Price
TLEDPLUS-N Lambda TLED+ for Nikon $2,335
TLEDPLUS-N25 1 Lambda TLED+ for Nikon TE200/300, Diaphot 200/300 $2,335
TLEDPLUS-Y Lambda TLED+ for Olympus $2,335
TLEDPLUS-Z Lambda TLED+ for Zeiss $2,335
TLEDPLUS-L Lambda TLED+ for Leica $2,335

Includes Lambda TLED-RGB light source, TLED controller and power supply
Catalog Number Description Price
TLED-RGB-N Lambda TLED-RGB for Nikon $2,230
TLED-RGB-Y Lambda TLED-RGB for Olympus $2,230

Includes Lambda TLED-RL light source, TLED controller and ring light
Catalog Number Description Price
TLED-RL Lambda TLED-RL reflected light illuminator $1,600

Catalog Number Description Price
TRIGGER USB trigger box $520

Custom mounting adapters are available at an additional cost. Contact Sutter for details.

* Other wavelengths may be available. Contact Sutter for details.
1 Replaces the epi-illuminator

Lambda 10-3
Lambda 10-2
Lambda 10-B

Available Wavelengths

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