alarm

backdrop

background

black

bomb

chronometer

clock

color

countdown

counter

dark

deadline

digit

digital

diode

display

electrical

electricity

electronic

fluorescent

gasdischarge

gasfilled

green

hour

indicator

interval

isolated

lcd

led

light

luminescent

luminous

minute

monitor

monochrome

neon

number

numeral

numeric

phosphor

screen

second

selfdestruction

stopwatch

tech

technology

time

timer

watch

zero