On the package of the US-05 it says it's temperature range is 58-75F. However, all the reading on forums I am finding people tend to the lower end of the spectrum, even calling upper-60's to be too high.
This is my first time brewing and I'm in SE Asia using a DIY cooler. Room temps here are between 82F and 88F. I'm able to get the ambient temp in the cooler down to 64-66F and the temp on the fermenter has been a consistent 70F. Are these temps ok for an IPA? Should I try and get my ambient down closer to 60F? I do enjoy that 'grapefruit' flavour and best I can tell that happens at the higher-end of the temp scale, but I just want to be sure.