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LED Colour Temperature, CRI and Flicker Buying Guide
Verified 2026-09-05 · By VUKAR Editorial Team
Compare Crompton Dynaray 9 W B22 in Cool Day Light and Warm White. Both list 945 lumens; the colour choice is a separate decision.
- Match the full colour variant, not just Dynaray 9 W.
- Lumens describe light output, not its colour.
- The page does not verify exact kelvin, CRI or flicker measurements.
- Try one suitable bulb before changing every lamp.
Translate the label
- Dynaray is the product family name.
- B22 is the cap type. Match it to the holder.
- Cool Day Light and Warm White name different light appearances.
- Warm light does not mean the bulb heats the room more.
- 9 W is input power; 945 lumens is the listed light output.
Same listed output, two colour choices
Products you can evaluate
Exact-model examples, not rankings. Confirm stock, delivery, final price and written terms before purchase.
Crompton
Dynaray LED bulb
Exact model/variant: 9 W — B22 — Cool Day Light
Compare when you prefer a cooler light appearance.[S1]
- 945 lm listed
- Confirm pack colour code
Price: Use the official buying routes; confirm exact colour, pack count, current price and availability.
Seller: Crompton official India website · checked 2026-09-05
Check current price and stockCrompton
Dynaray LED bulb
Exact model/variant: 9 W — B22 — Warm White
Compare when you prefer a warmer light appearance.[S1]
- 945 lm listed
- Confirm pack colour code
Price: Use the official buying routes; confirm exact colour, pack count, current price and availability.
Seller: Crompton official India website · checked 2026-09-05
Check current price and stockWhat kelvin and CRI tell you
- Kelvin, written K, describes the appearance of white light.
- A lower white-light K value generally looks warmer; a higher value looks cooler.
- CRI describes colour rendering against a reference light.
- Two bulbs can have the same light colour but show object colours differently.
- Do not invent a K or CRI value from the words warm or daylight.
Use your room as the final check
- Look at the same wall, clothes or objects under each shortlisted light.
- Keep the fitting and viewing position the same.
- Check whether the exposed bulb feels too glaring from your seat.
- Try the light at the time of day you normally use the room.
- For matching lamps, order the same colour variant and check the delivered labels.
- A website photo cannot show exactly how your room will look.
Flicker needs its own evidence
- Flicker is a change in light output over time.
- LED technology alone is not proof of low flicker.
- Ask for measurements for the exact lamp and any intended dimmer setting.
- A phone-camera band is not a complete flicker test.
- No flicker test or eye-health claim is made for these Dynaray variants.
Check cost after the light suits you
- Both listed variants use 9 W, so equal hours give equal rated-watt energy estimates.
- Use your quantity, hours, tariff and actual purchase price.
- A cost calculator cannot score colour, glare or flicker.
- Do not pay extra based only on a vague premium-light claim.
- Ask which verified feature, control or warranty term explains the difference.
Ask before buying a whole set
- Will the invoice name Cool Day Light or Warm White?
- Can I see the exact K, CRI and lumen values on the pack?
- Is there an exact-model flicker report?
- Is this bulb approved for my dimmer and enclosed fitting?
- Can I check one bulb before ordering the remaining quantity?
- What current replacement terms and proof of purchase are required?
Keep the buying check simple
- Open Crompton’s official page and select the right colour.
- The page offers Buy On Amazon and Buy From Store routes.
- Check the destination’s exact variant and pack count.
- Confirm current price, stock, delivery and warranty before payment.
- No manufacturer photo is copied here; the model card keeps the variant clear.
Quick questions
Which colour is best?
That depends on the look you want. Compare one bulb in your actual room; this guide does not rank the two colours.[S1] [S2]
Does daylight mean better colour accuracy?
No. Light colour and colour rendering describe different things. Ask for the exact CRI evidence.[S2]
Is missing flicker data a criticism of the brand?
No. It is a limit of the evidence checked for this guide. Ask the seller or manufacturer for the exact report.[S3]
Can I fit either bulb without checking?
Match the B22 holder and the fixture’s instructions. Dimming and enclosed-fixture suitability were not verified.[S1]
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
- Dynaray 9 W B22 colour variants — Crompton; accessed 2026-09-05
- LED colour characteristics — US Department of Energy; accessed 2026-09-05
- Flicker research — US Department of Energy; accessed 2026-09-05
