1. General Information/Product Identification

️· Product: LW T67C LED
️· Type: Series type LED. This suggests variations exist within the line.
️· Datasheet Date: 2005-10-19

2. Electrical Characteristics (Implied - Not explicitly listed, but assumed)

️· While not specifically listed, the datasheet mentions "I_F = 20 mA" (Forward Current of 20mA) and a standard operating temperature of 25°C. These are common electrical parameters for LEDs. *You're expected to know the typical forward voltage (Vf) - consult a separate datasheet if needed.*

3. Optical Characteristics

️· Typical Luminous Intensity (I): Varies by group, ranging from 224 to 900 mcd (millicandela). See "Brightness Groups" section for specifics.
️· Typical Luminous Flux (Φ): Ranges from 760 to 2400 mlm (millilumen).
️· Relative Spectral Emission: A graph showing the LED's emission spectrum. It peaks around 550 nm (likely greenish-yellow), which is typical for an amber/yellow LED.
️· Radiation Characteristic: A polar plot demonstrating the LED's viewing angle. The maximum intensity is near directly in front (0° angle) with significant falloff as the angle increases (120 degrees).

4. Brightness Groups

️· The LED is manufactured in various brightness groups (S2, T1, T2, U1, U2, V1).
️· Each group has a defined range of luminous intensity.
️· Standard shipping is limited to groups of 3, 4, or 6 brightness groups within each selection. Individual brightness groups *cannot* be ordered.

5. Chromaticity Groups (Color Groups)

️· LEDs are also grouped by their color coordinates (Cx, Cy).
️· Examples: 5K, 6L, 7K, 8L.
️· Each selection contains *one* color group per packing unit.

6. Packaging and Labeling

️· Group Name on Label: Example: T2-6L. This indicates both the brightness group and the color group.

7. Key Diagrams & Graphs

️· Relative Spectral Emission: Shows the distribution of light wavelengths emitted by the LED.
️· Radiation Characteristic: Polar plot showing light intensity as a function of viewing angle.
️· Brightness Groups Table: Defines the range of intensity within each group.
️· Chromaticity Groups Table: Defines the color coordinates for each group.

Key Takeaways

️· Variations Exist: This is a series of LEDs, so there are variations in brightness and color.
️· Group Ordering: LEDs are grouped by brightness and color. You can only order selections that contain a group of 3, 4, or 6 groups.
️· Color/Brightness Consistency: Ordering is constrained to these group sizes, so there's a level of consistency *within* a group, but not necessarily between groups.
️· Viewing Angle: The LED has a relatively narrow viewing angle, meaning the light is concentrated in a smaller area.
️· Spectrum: The spectrum indicates an amber/yellow color emission.
️· Limited Information: Important electrical parameters (forward voltage) are not listed here; you would need the full datasheet for these.