Specify humidity

Hiya, It seemed a bit weird to me at first too to only give 1 RH. While when lamp off - temp's drop so i can use a lower RH. Just put in your diary RH Daytime RH NightTime Temp DayTime Temp Nighttime

I specify with lights on. Obviously with lights off it can skyrocket. As another said, that matters too, but most people are only recording lights on humidty on here. But also like he said, its your diary and you can do what you want. All in how in depth you want your diary to be. The more you record, the less you have to remember. Such as you can record the lights on humidty and in your notes about the week, provide your lights off humidty for future reference. Best of luck! Happy Growing!

"day" - lights on being the assumption

Night is less relevant. Still good to avoid extremes, of course. But, as far as correlating it to growth rates or other things you can observe, the daytime RH is probably more important to take note of it's your diary, do whatever you want.

Good afternoon, I only check sporadically... It's not something I check every day, and when I do check, it's with the light on, because then the levels tend to drop and that can make a difference in young plants...