Hey,
I wouldn't sweat the extra light, as long as you are otherwise ensuring total darkness one single mishap should not ruin anything. If it happens too often though it can and will mess up your plants turning them hermie or even almost completely male.
Bulster Reviewed by Bulster on . left the lights on..how bad? lights on for an extra 1hr and 15min. sould i be concerned? here is one for thought...roots dont like light, green light is ok when flowering at night...what bout green light on the roots? Rating: 5