noun, noun which may take the genitive case particle 'no'
light and heat; energy (for lighting and heating)
Often used in the context of household utilities, especially in the compound 光熱費 (こうねつひ, utility expenses for electricity and gas).
This month's utility bill was higher than last month's.
To save on energy costs, I raised the air conditioner's set temperature.
utility costs; energy bill; cost of heat and electricity
light, heating and water (utilities)
Compound of 光 (light) and 熱 (heat). The exact historical derivation is uncertain, but the combination naturally refers to the two main forms of energy used in households.