Digital Thermostat

Hi guys I've been lookin to get a different thermostat for my heater. My current thermostat is +2/-2. Having problems keeping steady temp keeps fluctuating during dark period. Im after a digital thermostat which works in .5 of a degree. Is there such product out there?

there is no need to be that accurate no i think most thermostats will be +1/-1 degree at least. just make sure there is a temp difference of about 15 degrees +7/-7 degrees wont hurt at all

I couldn't tell a difference of 2 degrees, I'm pretty sure your plants won't either, it's like a fart in the wind.

Ok cheers mate.