Switchable LED Light Source contains 10 high power LEDs placed on a revolving disc. The user switches between a selection of monochromatic LED sources and white LED using an application software. It enables controlling also light intensity, duration and a couple of the other parameters. A manually adjustable lens is used to focus light on a sample installed in a photo-electrochemical cell (cell is not included in the setup). The LED disc is exchangeable, which means that the user can order a disc with custom LEDs, separately.

No.	Mean wavelength [nm]	Width [nm]	Max current [mA]	Max light power [mW]	Color
1	360-370	9.7	500	30.50	UV
2	380-390	12.6	500	71.40	UV
3	400-410	13	700	100.09	UV
4	450-460	18	700	92.00	Blue
5	520-530	28.5	700	33.50	Green
6	590-600	14.7	700	29.50	Amber
7	630-640	15.3	700	44.50	Red
8	730-740	18.7	700	46.40	Red
9	850-860	16.6	700	44.60	IR
10	420-700	280	700	60	white

Compared to conventional light sources such as halogen and gas discharge lamps, this Switchable LED Light Source offers many advantages such as:

higher signal-to-noise ratios (due to narrow bandwidth emission),
better stability,
longer life (LEDs are operated below their maximum power level),
lower replacement costs,
no active cooling requirements,
no thermal filters in the optical path,
smaller dimensions, etc.

Application note
Switchable LED Light Source is a universal light source for general lab use and OEM applications. It can be used wherever a strong monochromatic LED light is needed. In photo-electrochemistry it is often used as an economy light source for fast screening of photo-catalytic thin films, as well as the broad range of standard photoelectrochemical experiments. It is a versatile light source with LED switching and accurate intensity modulation of each individual LED. The device is compatible with the cages from Thorlabs and TECHSPEC from Edmund Optics.

Specification
Spectral range: 280 nm – 1000 nm (depends on selection of LEDs)
Lens focal length: 25 mm
Number of LEDs per disc: 10 pcs
Disc rotation: automatized
Light beam focus: manual
Light intensity adjustment: application software
LED positioning on optical axis: automatized
Light on/off duration: application software
PC connectivity: USB 2.0
Power supply: 230 V, 50 Hz or 115 V, 60 Hz.

Product includes
1 x Switchable LED Light Source