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Crompton Dynaray 9W vs 12W LED Bulb Buying Guide
Verified 2026-09-05 · By VUKAR Editorial Team
Compare these two Cool Day Light bulbs. Choose the light output first, then check the fitting.
- Need the listed 945 lm output? Check the 9 W variant.
- Need the listed 1260 lm output? Check the 12 W variant.
- Both use B22 holders. Confirm your holder before ordering.
- Already happy with your room light? Match its lumens, not just its watts.
Take one photo before shopping
- Photograph the old bulb's printed label.
- Note the holder, wattage and colour name.
- Find the lumen number on its box or model page.
- Measure the space inside the shade.
- Write down how many hours the light stays on.
What does Dynaray mean?
- Dynaray is Crompton's series name, not a unit of brightness.
- 9 W and 12 W tell you power use.
- B22 identifies the holder type. Match it exactly.
- Cool Day Light describes the light colour. It does not mean extra cooling.
Two exact Cool Day Light variants
Products you can evaluate
Two exact brand-listed variants, not a ranking. Official pages provide buying routes; seller stock and final price still need checking.
Crompton
9W B22 Dynaray LED Bulb
Exact model/variant: Dynaray — 9 W — B22 — Cool Day Light
Consider when its listed output meets your need.[S2]
- 945 lm listed
- B22 holder
- Cool Day Light variant
Price: Open the exact model and use its buying route. Confirm pack, seller and current price.
Seller: Crompton official India website · checked 2026-09-05
Check current price and stockCrompton
12W B22 Dynaray LED Bulb
Exact model/variant: Dynaray — 12 W — B22 — Cool Day Light
Consider when you need the higher listed output.[S3]
- 1260 lm listed
- B22 holder
- Cool Day Light variant
Price: Open the exact model and use its buying route. Confirm pack, seller and current price.
Seller: Crompton official India website · checked 2026-09-05
Check current price and stockMore light is not the same as better value
- The 12 W listing gives 315 lm more output. It also uses 3 W more power.
- Both listed pairs work out to 105 lm per watt: divide lumens by watts.
- So these are different output choices, not proof that one is more efficient.
- Try one bulb in the actual room before buying a full set.
What the words on the box mean
| Word | Simple meaning | Your check |
|---|---|---|
| Lumens (lm) | Amount of light leaving the bulb | Match the output you need[S1] |
| Watts (W) | Power used while on | Compare after matching brightness[S1] |
| Colour temperature (K) | How warm or cool white light looks | Match nearby lights[S5] |
| CRI | How colours look under the light | Ask when colour matters[S5] |
| Rated life | A rating, not a failure date | Read its basis and warranty separately[S4] |
What does the extra 3 W cost?
- Example only: one bulb, 5 hours daily, 365 days, ₹8 per electricity unit.
- The 3 W difference uses 5.475 extra units yearly.
- That is about ₹44 extra per year in this example.
- Your rate and hours may differ. Enter your own numbers below.
- Do not call this waste if you need the higher light output.
Ask before you pay
- Is this the exact B22 Cool Day Light variant?
- Does the supplied box match the model and lumen number?
- Will it fit my shade and rated supply?
- Is this exact bulb suitable for my dimmer or closed fitting?
- What do delivery and the full pack cost?
- Who handles a warranty claim, and what invoice is needed?
One quick safety check
Turn the power off and let the old bulb cool before handling it.[S4]
Stop if the holder is loose, burnt or damaged. Ask an electrician to check it. Do not alter the fitting to make a bulb fit.[S4]
For a dimmer, closed shade or outdoor light, get the exact model's written suitability first. LEDs still need to lose heat.[S4]
Quick questions
Will the 12 W bulb suit every bigger room?
No. Light placement, shade and the job matter too. Use the listed lumens to shortlist, then try it in your room.[S1] [S4]
Does a one-year warranty mean it stops after a year?
No. Warranty coverage and useful life are different. Read the written terms; do not turn warranty years into a life promise.[S2] [S3] [S4]
This comparison covers only the listed models, criteria, sources, and verification date. Omission or missing public data is not a negative judgement about any brand.
References used for this guide
- Learn About Brightness — ENERGY STAR; accessed 2026-09-05
- 9W B22 Dynaray LED Bulb — Crompton; accessed 2026-09-05
- 12W B22 Dynaray LED Bulb — Crompton; accessed 2026-09-05
- Learn About LED Lighting — ENERGY STAR; accessed 2026-09-05
- Lighting definitions: colour temperature and CRI — Wipro Consumer Lighting; accessed 2026-09-05
