英文關鍵字
blue
bright
bulb
change
changing
concept
conservation
contractor
economical
efficiency
efficient
electric
electrician
electricity
energy
equipment
fix
fluorescent
hand
hanging
home
house
incandescent
indoors
innovation
installation
installing
job
lamp
light
lightbulb
maintenance
man
manual
modern
old
overhauling
person
power
professional
repair
replace
service
technician
technology
uniform
white
work
workman