Idiots guide to grow lights

The relative progress of Red Robins - the lights make a huge difference to sturdiness and colour



Growlight box Mk II, Mk. I was getting a bit overcrowded so I made a bigger box.  Although the light is likely to be more diffused over a larger area, I figured it is better that than the plants being all bunched  up.

Thanks for carrying the flag Jen, I still have them switched off!

Why??