The safety lamp was invented by Sir Humphrey Davy in 1815 to provide a safe source of light underground.
The lamp allowed oxygen for the flame to get in, but stopped a flame or spark mixing with explosive gases found in mines.
Moths are attracted to bright light at night. At Parc Slip there are over 600 different species of butterfly and moth (Lepidoptera) recorded at the reserve, including national rarities such as the Small Blue and Dotted Chestnut.
Best places for Lepidoptera are the species rich grassland habitats.