Your jars are sitting next to your ballast? Let me suggest that you build a Tub in Tub incubator, cause if they are sitting next to your ballast are they getting light? Light doesn't really affect the growth of the mycelium but you will have issues when the jars get close to finishing cause they will start pinning in the jar before all the substrate is completely colonized. At that point you have problems because if you take the cakes out of the jar with uncolonized spots they will be contam bound. And if they dont finish before the mushies in the jar start to die they will be contam bound. A tub in tub incubator is two rubbermaid or whatever brand tubs of the same size, the bottom one has water in it with a fish tank heater in it, and the top one just sits down in the bottom one. The water comes up around the sides of the top tub and warms the tub. Ideally you want to have your incubator at around 80-82 degrees cause 84-86 is optimal incubation temps for cubensis, and mycelium does produce some heat so the temp inside the jars is usually 2-4 degrees warmer than the temp outside the jars. I have a good bit of experience with mushies, still trying to get bulk to work without contams, but I have many PF Tek grows under my belt so if you have any questions feel free to PM me, I'm always glad to help. Also, with a TiT incubator you will want to add some peroxide and salt to the water in the bottom tub to prevent bacterial growth of the stagnant water, and don't forget to check the water level at least once a week because if it starts to dry out you will burn out your heater. And find a heater that has a manually adjustable thermostat, the newer ones that have the auto thermostat typically don't go past 77 degrees, which will work just fine but may be a bit slower. I needed more space so I got away from the TiT and took some black vinyl and turned the top shelf of my closet into an incubator, ambient temps are usually between 77-79 up there so it works for me, a couple extra days to incubate for me is fine because I typically run about 4-5 dozen cakes at a time.