How can I safely work in the growroom at night?

Our plants need an uninterrupted dark period to trigger/continue the flowering response. Even a split-second of strong enough light can 'reset' the cycle of a less-stable strain (cultivar) which makes the plants see a dark period of less than 12 hours and could cause them to think they should be vegging instead. If you need to enter the growroom during the "night" or dark period, to spray or to do something else that requires the lights off, here is the safest way to do it without stressing the plants or making them think it's veg time, which, in some cases can make them turn hermaphrodite. Solution: Wire up a light socket near the door (so you can easily reach the switch in the dark) with a green light bulb. Find these at most home-marts for under a few dollars. Going back to grade 10 physics we remember that plants don't "see" (absorb) green light, therefore it can be safely used at night.