yeah, the first time i did cook them.. thermometer registered like 37C (basically just under a 100F).. I suppose a heating pad would be in order if you are using flourescents, since they give off no heat.. but the heat coming off regular 100w bulb at about 8" is keeping the temperature inside at 25C (77F).. My humidifier was registering 99% even though both vents were open. I know it is high but i rather be too moist then too dry at that stage.. I did it like that for the first week for 24h light.. then switched to 18/6 where they are now..