Visible & Near-Infrared Light Sources
High Power and High Stability Visible Lamp for the 350-2500nm range Request a QuoteDownload Instrument PDFSL1 Tungsten Halogen Light Sources
Visible & NIR range from
350-2500nm 
Popular Systems: VIS-NIR Absorbance, Optical Metrology, Calibration Sources
StellarNet has a variety of VIS-NIR light sources available for spectroscopy applications.
The SL1 Tungsten Halogen Lamps have a wide spectral Range for 350-2500nm – effective for color, reflectance, transmittance, and absorbance measurements
Extensive Life – The SL1 has a 10,000 hour Tungsten Halogen lamp filled with Krypton gas
High Output Power – 200 W/m^2 and 2800K color temperature for many types of spectroscopy applications
Great Compatibility/Versatility – manipulate output with color-enhancing or signal-attenuating filters.
Miniature Size – Its small size of only 1.5” x 3” x 3.5” makes it a perfect match for our compact spectrometers. A small footprint makes this a great lamp for bench top applications.
Portability – The small enclosure and low power consumption provides the ultimate VIS-NIR light source for portability. 12VDC power requirements easily allow you to run off our battery pack accessories for hours of field work.
Options and Upgrades
The SL1-FILTER includes a 0.5” diameter filter holder nose cone. Customers can use a variety of filters for spectral attenuation, band pass, and more. Includes CEF filter to improve blue sensitivity
CEF- Color Equalization Filter adds red light suppression and blue light sensitivity for improved S/N in color applications
Lens-DCX adds internal lens assembly to SL1-Filter to amplify output signal 4-7x
The SL1-CUV adds a 1cm cuvette holder with integrated collimating lens. Dual purpose allows the collimating lens to be demounted for far field emission monitoring
SL1-BAT is a unique option that adds a jack to any SL1 so it can be powered from +5VDC. Users can achieve complete portability with the BP1 or BP2 battery pack for the spectrometer and the SL1-BAT
SL1-CAL is configured specifically for Irradiance calibrations (300-1100nm/300-1700nm). A USB drive is supplied with intensity data used to calibrate a SpectroRadiometer.
SL1B replacement bulb for SL1 Tungsten light source
Technical Specifications
| SL1 VIS-NIR Light Source | |||
| Weight: | 0.62 lbs (280g) | Output to bulb: | 5VDC |
| Power consumption: | 12 watts | Output regulation: | 0.2% |
| Spectral Range: | 350 – 2500nm | External filter accessory: | Demountable |
| Time to stabilize: | 1 min | External filter holder: | 0.5″ diameter filters SL1-Filter only |
| Power output: | 200 Watts /m2 | Bulb Life: | +10,000hrs |
| Bulb Color Temp: | 2800K | Connector: | SMA 905 |
Other Popular Light Sources
Technical Information Request
Laser induced optical reconfiguration in Ge Sb Te films with composition dependent response
Marina Zhezhu, A. Vasilev, M. Sukiasyan, A. Kutuzyan, N. Anosov, M. Yaprintsev, Davit Ghazaryan, and Hermine Gharagulyan | Materials Science and Engineering B | July 28, 2026 | 10.1016/j.mseb.2026.11973110.3390/pr14142337 Abstract Phase-change Ge–Sb–Te (GST) materials...