I should have been more clear about what I meant. At the moment you have a dimmer, which is great too if you have the time to check the temps multiple times a day. $30 is your budget right now from what I understand. I don't see much of a point of spending the $30 on the hydrofarm, which is okay as far as cheap thermostats go, when you have a dimmer. You could keep the dimmer for another 6 months, save your $30, save up money however you do (someone mentioned you don't have a job, but maybe help your parents out around the house?) and for $60-$80 you can get a thermostat that will last you years. Once the probe on the hydrofarm goes, you have to replace the whole thing, then that's another $30 for another one. I've only had mine for about 2 months and I don't know the life span of the probe, so I can't help you there.