I have used Performance Forte tubes, including the LunarLight tubes. I don't think they are any more flat-prone than other brands. Yes, you do have to be more careful when installing lighter weight tubes. Absolutely do not use tire levers. Learn to use your palms instead of your finger tips.

Yes, lighterweight tubes do lose a couple more PSI per day than heavy tubes, but most people I know pump up their tires everyday anyway. 10% per hour is just ignorant.

If you need more flat protection, I think flat resistant tires do a much better job than heavier tubes.