Lighting calculators – Shoploop

How many lumens do I need?

Enter the room size and what happens in it. We work out the total light output the space needs.

Room length ft

Room width ft

Use of the room

Works out fixture count and spacing for a false-ceiling layout.

Room length ft

Room width ft

Ceiling height ft

Use of the room

Output per fixture lm A 9W COB is roughly 800–900 lm; a 12W is roughly 1,100 lm.

Compare what you are running now against LED, over a year.

Number of fixtures

Existing wattage each W

LED wattage each W

Hours used per day

Tariff per unit Per kWh, as billed.

Replacing an incandescent, halogen or CFL? This is the LED wattage that matches its brightness.

Existing wattage W

Existing lamp type

See what each Kelvin value looks like, and where it belongs.

Colour temperature

Rough panel and battery sizing for an off-grid fixture.

Fixture wattage W

Hours of light needed per night

Usable sun hours per day Around 5 for most of Pakistan; use 4 for winter reliability.

Cloudy days to cover

Send us the requirement — room size, quantity, budget — and we will recommend a fixture and quote the best price we can find.