Review on 🔦 Chanzon 60 pcs Assortment Kit Pack of 3mm LED Diode Lights (Diffused Round Lens, DC 3V 20mA) - Lighting Bulb Lamp in 6 Colors x 10 pcs - Electronics Components Light Emitting Diodes Parts - Assorted Variety Color by Joseph Ramos

Bright output and good value. I bought these to use for model train traffic lights and indicators. All six are diffused including white.Red seems dimmer than green but this is mostly because the human eye is most sensitive to green light. These are bright enough that you can match apparent brightness to red by reducing the current in the green and other sensitive colors.Measured voltages powered from a 15 mA regulated current source: green = 2.95 V, orange = 2.02 V, yellow = 2.06 V, red = 2.07 V, blue = 3.01 V and white = 3.05 V.Do not try to power these from 3 volts DC or AC without a current limiting resistor (47 or 100 ohms) or you will burn them out as some users have experienced. Full brightness will be hard to achieve or match using 3 V. It is easier to control brightness/current from a higher voltage such as 9V and 470 to 1000 ohms in series.You could also use a PN4393 JFET (or similar Idss around 15 mA ) as a current regulator. A current regulator will allow you to operate at constant brightness from 4 to 12 V. Short or tie the gate to the source with a resistor to control the current.