Demo content · illustrative estimate · not yet verified
04 / Electricity · Hack #37
Switch off the lights and fan when you leave the room.
Your mum was right. Small, but it costs nothing and adds up over a year.
“your mum was right.”Potential saving
RM2–RM8 / month
≈ RM24–RM96 / year
Effort
10 seconds
Wait, what?
1 / 10
“everyone knows this”
CheapHack ratio™
NO-BRAINERsaving ÷ effort
COMMUNITY TIPDemoLast checked: 12 AUG 2026
THE PROBLEM
Lights and fans left running in empty rooms are pure waste.
WHAT MOST PEOPLE DO
Leave them on 'because I'm coming back'.
(no judgement. we did too.)THE CHEAPHACK
Flick the switch on the way out. If you keep forgetting, a cheap motion-sensor bulb in the corridor or bathroom does it for you.
HOW TO DO IT
- STEP 1Switch off when leaving.
- STEP 2Consider a motion-sensor bulb for the spots you always forget.
You’ll need: A hand
THE MATH
RM5 × 12 = RM60
Per month
RM2–RM8
Per year
≈ RM24–RM96
is it worth the hassle?DO THIS NOW.(no-brainer ratio · 10 seconds)
WHEN THIS MAKES SENSE
- Everyone.
WHEN IT DOESN’T
- It always does. This is level 1.
THINGS TO WATCH OUT FOR
- Saving depends on how many lights and fans and for how long.
DO THE MATH WITH YOUR NUMBERS
Do the math ↗
You save
RM20 − RM15 = RM5 × 365
RM152 / month
RM1,825 / year
RM9,125 over 5 years
okay, now this is getting serious.Is it worth the hassle?
DO THIS NOW.this is a very good hourly rate.
RM1,825 for 1 min ≈ RM109,500 per hour of effort.
DID IT WORK FOR YOU?
Demo state: votes are not yet counted. No fake numbers here.
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“there's always one.”
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