The effect of different colours of light on plant growth and development with respect to the plant height, colour and other growth parameters were studied. Vigna unguiculata was the prominent species used to confirm the effects. Vigna unguiculata were sown in a laboratory experiment in Niger Delta Basin. Development Authority; the experiment was done in a closed compartment box with the plants exposed to different light colors for an extended period of 18 hours. Red light was shown to be useful for stem elongation with it having the highest growth value of 18.2cm and blue light having the lowest value of 14.5cm, the blue light were seen to develop more branches which in turn resulted to more flowering and seed formation, it was also shown to have more leaves than other experiment other than the control with a maximum of 3 leaves. Green leaves were shown to possess a higher degree of green colouration both above its leaves and under, this is due to its high penetrating power.