An illumination device that has an orange light, with LEDs having a wavelength in the range of 580-620 nm, and/or a red light with LEDs having a wavelength of light in the range of 620-650 nm for side-transillumination of the veins. Orange light has been found to be beneficial for transillumination of superficial veins, while red light has been found to be beneficial for transillumination of deeper veins. In addition, the device has white light which is used for illumination of the surface of the skin. The illumination device contains a manual or automatic switch or switching mechanism that allows the user to easily switch between the orange light/red light and the white exam light by simply pressing a button or moving the device.