absolutely not. LSD is FAR too heat sensitive. it can be destroyed by much lower temperatures than a lighter's flame, in fact
The body heat from keeping it in your pocket while doing too much physical activity can degrade it. What do you think a lighter is gonna do?
You cant smoke it but you can (if you had the resources) put a diluted amount of liquid LSD in a pressurized atomizer (asthma inhaler) and puff acid.
DON'T WASTE GOOD ACID!!!! Keep it away from any form of heat light and moisture. And love it and let it know you care and value it!