@ClockworkOnion: Thanks! @L04D3D: Hi! Yes, I agree with you 100%. I was aiming for something a little more stylised, however, and I liked the colorful effect when the lights were switched off 
Thanks for your tips on emissive control… I’m like a sponge at the moment learning anything and everything I can! For these lights, I had multiplied the base white light with a 3 constant to the required colors I was aiming for.