Havells 40 W B22 LED Bulb, Cool Day Light 6500K

• Manufacturer: Havells India Ltd — Made in India
• Model: LHLDEIEDML8X040
• Wattage: 40 W — a high-output bulb, not a standard household one
• Light Output: 4,200 lumens
• Colour Temperature: 6500 K Cool Day Light
• Efficacy: 105 lm/W · CRI: 80–90 · Rated Life: 30,000 hours
• Cap: B22 pin type (bayonet) · Size: 147 x 180 mm — larger than a standard bulb
• BIS certified · Warranty: 12 months

Havells 40 W B22 LED Bulb puts out 4,200 lumens at 6500 K cool daylight — enough to light a full living room, a shop floor, or a workshop bay from a single point. This is not an ordinary household bulb: most B22 LEDs are 9 to 15 W, so at 40 W this is roughly three to four times the output of what people normally screw into a holder.

The efficiency figure is what makes that practical. At 105 lm/W, producing 4,200 lumens costs 40 watts. An incandescent bulb of similar brightness would draw somewhere around 250–300 W and run hot enough to burn you. Over a 30,000-hour rated life, that difference in running cost dwarfs the price of the bulb several times over.

CRI of 80–90 means colours render accurately — worth having anywhere you need to judge a colour properly, such as a shop displaying goods, a workshop, or a kitchen. And 6500 K is cool daylight: a crisp, bright white rather than the yellow of a warm bulb. It suits work areas, kitchens, shops and study spaces. For a bedroom or a relaxed living room, many people prefer a warmer 2700–3000 K instead.

Technical Specifications

Recommended Applications

1) How bright is 4,200 lumens in practice?

Bright enough to light a full living room, shop floor or workshop bay from one point. For comparison, a typical household LED bulb is 9–12 W producing around 900–1,200 lumens — so this is roughly three to four times the output. An incandescent of similar brightness would draw about 250–300 W.

2) Will it fit my light fitting?

Measure first. At 147 x 180 mm this bulb is more than twice the diameter of a standard LED bulb and considerably longer. It will not fit most pendant shades, table lamps, or enclosed ceiling fittings. It suits open batten holders and high-bay style fittings with room around it. This is the most common reason a high-wattage bulb gets returned, so it is worth checking properly.

3) What is B22, and how do I know if that is what I have?

B22 is the bayonet or pin-type cap — the one you push in and twist a quarter turn to lock. It is the most common holder type in India. The alternative is E27, a screw thread. Look at your existing bulb: two small pins on the sides means B22.

4) Why does it matter whether the fitting is open or enclosed?

Because of heat, and this is the thing that decides how long the bulb actually lasts. A 40 W LED produces real heat, and heat is what kills LED driver electronics. The 30,000-hour rating assumes the bulb can shed it. In a sealed glass globe or a fully enclosed fitting the heat has nowhere to go and life drops sharply. Use an open, ventilated fitting.

5) Is 6500 K the right colour for my room?

It depends on the room. 6500 K cool daylight is a crisp, bright white — excellent for shops, workshops, kitchens and study areas where you want alertness and accurate colour. For bedrooms and relaxed living rooms, many people find it clinical and prefer a warm white around 2700–3000 K instead.

1. Return within 24 hours of delivery for:
   • Damaged or defective product
   • Wrong or missing item
2. Product cannot be returned once installed or used
3. Refer to Refund Policy for complete details

Please check the bulb dimensions against your fitting before installing — a bulb that has been fitted cannot be returned.