The good night fast card is not a safe product to be used at home. This is because it gives out a lot of harmful gases on combustion which are not good for lungs and can cause breathing problems. Also, burning fast card can be very dangerous because just with a little stroke of wind it flies away and can set your whole home on fire if it came in contact of curtains, bed sheets or any other flammable substance.Not only this, even after giving out so much harmful gases, it is not at all effective in killing the mosquitoes.
So, I will definitely not recommend you to use this harmful and ineffective product. Rather, you should use the good night liquid which is far better than the good night fast card in killing the mosquitoes.