Back then, candles would have been made from either beeswax (churches and rich people) or tallow (everyone else). Spermaceti and brassica-oil candles were not yet in common use. The median family spent 65 shillings per year on candles. The total value stolen was 49.5 shillings. So a valid comparison would be 75% of the median family's annual lighting budget today. I estimate the annual cost for lighting at 1000 kWh grid power (US$120, GB£80), plus some replacement compact fluorescent bulbs (US$30, GB£20), for a crime equivalent of US$113 or GB£75.
Another valid comparison would be the amount it would cost for an equivalent amount of lighting now. In modern terms, the items stolen amounted to about 800 hours of a one-candela light source. Maybe one green 20mW LED and 6 AA alkaline (LR6) batteries, or a white LED and 6 D alkaline (LR20) batteries. This is equivalent to the light of leaving one 25W compact fluorescent bulb on for 6 hours.
Imagine if every time you left the light on in your bedroom when you left for school, your Dad killed you, and then danced on your grave, singing 'alleluia.
Another valid comparison would be the amount it would cost for an equivalent amount of lighting now. In modern terms, the items stolen amounted to about 800 hours of a one-candela light source. Maybe one green 20mW LED and 6 AA alkaline (LR6) batteries, or a white LED and 6 D alkaline (LR20) batteries. This is equivalent to the light of leaving one 25W compact fluorescent bulb on for 6 hours.
Imagine if every time you left the light on in your bedroom when you left for school, your Dad killed you, and then danced on your grave, singing 'alleluia.