PLEASE look at the herpstat intro for 100$ it is much better than on off types for the situation. Hydrofarms IMO need to be coupled with an accurate thermometer as they are have such poor accuracy on their own. (4ºF +/-) . Good thermometers cost more that the difference between the thermostats. It is better than the T-stat shuffle, buy cheap and shuffle back for better in a month or two.
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