when was the last time you changed your bulb?

an old bulb has diminished spectrum and even though there is light it may not be usable light for the plant to carry out photosynthesis
stra8outtaWeed Reviewed by stra8outtaWeed on . heat question Input appreciated!...... I have a growtent and a carbon filter with outtake fan as well as a ported hole bringing air in the bottom and an oscilating fan... my question is... while the carbon filter and outtake is on the temperatures get around 68 F... is this too cold for them??? when i turn it off the temp gets to right around 74-78 F. I have a 400W HPS any thoughts def would be great... Rating: 5