If I may mention, It's a good idea to wear a hat (not just glasses) to shield your eyes from diagonal rays/beams of light that come out from (above typically) LEDs, and HID especially, even if the light isn't going straight into your retina it can still cause harm over time, stray light collected at the tip of the lens of your eyeball can make its way through to your pupil, and I've heard reports of it causing harm, might take years to really effect someone, but still worth making mention for safety's sake.
Not to be overly paranoid, just wanted to add a harm reduction tip to where one might seriously be able to take advantage of it, such as your latest grow.
Please, stay safe everyone!
Cheers.
