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Light Bulbs & Fluorescent Lights

What type of bulb and socket to choose? We will advise you.

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Socket

The base part of the bulb that connects to the lamp. There are several types of fittings:

E27

 27 mm in diameter, this is one of the most common fittings. It’s used by almost every light source with a voltage of 230 V, i.e. classic incandescent lamps, halogen, energy-saving, and LED bulbs. You can usually find this type in ceiling or wall lighting fixtures or chandeliers.

E14

 Has the same screw as E27, so once again, it’s used in classic incandescent lamps, halogen, energy-saving, and LED bulbs. They differ only in diameter, which in this case is 14 mm. The operating voltage is 230 V. Commonly used in smaller lamps, spot lights, and candelabra and chandeliers consisting of a large number of light bulbs.

GU10

 This slot has no screw. Instead, it has two pins with a diameter of 5 mm that you snap into the lamp and twist slightly. Its operating voltage is 230 V and this type is most commonly encountered in halogen or LED bulbs. It is used in ceiling lights, spot lights, or in bathroom and lavatory fixtures.

G4

 A threadless socket, it features two pins 4 mm apart that you snap into the lamp. Its operating voltage is 12V. Most commonly found in kitchen counter lighting fixtures, low ceilings, or bars.

GU5.3

 Another threadless socket, it features two pins 1 mm in diameter and spaced 5.3 mm apart. The socket is designed for 12V. The light source is usually a halogen or LED bulb. Mainly used in smaller lamps and spot lights.

G9

 A threadless socket similar to GU10. It has two pins that snap into the lamp. This is the smallest size for 230V halogen and LED bulbs. Most commonly used in ceiling fixtures, spot lights, or in bathroom and lavatory fixtures.

R7s

 A linear, tube-shaped socket inserted into a fork with a pitch of 78-189 mm. Its operating voltage is 230 V. Used in halogen spotlights, LED lamps, floor lamps, or architectural lighting fixtures.

Technology

Incandescent light bulbs

  • The cheapest light source when it comes to purchase cost. The massive heat loss, however, makes them very inefficient. Over 90% of the consumed energy is converted into heat and only the remaining 10% into light. Their service life is also low – 1,000 hours on average.

Halogen bulbs

  • About 30% more efficient than incandescent bulbs. Illuminate at the full power right after you switch them on, can be dimmed, and their purchase cost is lower than that of LED bulbs. Their operating costs are considerably higher, so they are mainly used in places where you need strong light for a short time. Their service life is 2,000 to 3,000 hours.

Energy-effcient light bulbs

  • Roughly 75% more efficient than incandescent bulbs. After switching, it takes a while before they reach their maximum brightness, so they aren’t suitable for places where lights are often turned on and off. Lose their original luminance after a few years. Their service life ranges between 6,000 and 20,000 hours.

LED bulbs

  • The latest and most efficient technology. Their service life is remarkable - usually between 20,000 and 50,000 hours. Achieve high brightness with minimum energy consumption. A 9W LED bulb is equivalent to a 60W halogen lamp.
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757 Results
Philips Hue White Ambiance 6W E14 - LED Bulb
2 variants
4.9 99×
Philips Hue White Ambiance 6W E14
LED Bulb - smart, lamp cap E14 - lamp cap E14, power input 6 W, 230 V, luminous flux 470 lm, adjustable light temperature (2200-6500 K), diameter of 3,9 cm, Bluetooth, compatible with Apple Home, Philips Hue, control via app in both Czech and English, lifespan 25000 h, energy label G, 1 piece in package
52.90 €
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In stock 4 pcs
Order Code: ESO2557q1
Solight LED Reflector Bulb, E14, 5W, 4000K - LED Bulb
4.8 58×
Solight LED Reflector Bulb, E14, 5W, 4000K
LED Bulb - lamp cap E14, power input 5 W, luminous flux 400 lm, neutral light (4000 K), diameter of 5 cm, energy label F, 1 piece in package
2.19 €
Buy
In stock > 50 pcs
Order Code: SD078t
AlzaPower LED 9-60W, E27, R63, 2700K, set of 2 - LED Bulb
4.7 19×
AlzaPower LED 9-60W, E27, R63, 2700K, set of 2
LED Bulb - lamp cap E27, power input 9 W, 230 V, luminous flux 820 lm, warm light (2700 K), diameter of 6,3 cm, lifespan 25000 h, energy label F, 2 in package - 2.45 €/ks
Great price 4.89 €
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In stock > 20 pcs
Order Code: APWLED-0011c
Philips Hue White Ambiance 8W 1100 E27 Promo starter kit - LED Bulb
2 colors
4.8 24×
Philips Hue White Ambiance 8W 1100 E27 Promo starter kit
LED Bulb - smart, lamp cap E27 - lamp cap E27, power input 8 W, 230 V, luminous flux 1100 lm, adjustable light temperature (2200-6500 K), diameter of 6 cm, Bluetooth, compatible with Apple Home, Philips Hue, control via app in both Czech and English, lifespan 25000 h, energy label F, 2 in package
98.90 €
Buy
In stock > 5 pcs
Order Code: PHL21017
Philips LED 60W ST64 E27 2700K CL UE SRT4 - LED Bulb
5.0 3×
Philips LED 60W ST64 E27 2700K CL UE SRT4
LED Bulb - lamp cap E27, power input 60 W, 230 V, luminous flux 840 lm, warm light (2700 K), diameter of 6,4 cm, lifespan 50000 h, energy label A, 1 piece in package
Discounted -5 % 6.59 € 6.99 €
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In stock 1 pcs
Order Code: PHLS25025
TESLA LED BULB, G9, 4W, 400lm, 3000K Warm White, 2 pcs - LED Bulb
3 variants
4.5 60×
TESLA LED BULB, G9, 4W, 400lm, 3000K Warm White, 2 pcs
LED Bulb - lamp cap G9, power input 4 W, 230 V, luminous flux 400 lm, warm light (3000 K), diameter of 1,8 cm, lifespan 25000 h, energy label F, 2 in package - 4.05 €/pcs
8.09 €
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In stock > 10 pcs
Order Code: TslLigh22_04
RETLUX RLL 420 GU5.3 spot 7W 12V WW - LED Bulb
4.5 25×
RETLUX RLL 420 GU5.3 spot 7W 12V WW
LED Bulb - lamp cap GU5,3, power input 7 W, 12 V, luminous flux 660 lm, diameter of 5 cm, lifespan 25000 h, energy label F, 1 piece in package
Buy with code ALZADAYS15DE The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Erhalten Sie 15 % Rabatt mit dem Code ALZADAYS15DE. Das Angebot gilt bis zum 15. September 2025 oder solange der Vorrat reicht und ist nur für Endverbraucher bestimmt. 4.07 €
4.79 €
Buy
In stock > 20 pcs
Order Code: RTLX17119
RETLUX RLL 298 G4 3,5 W LED 12V WW - LED Bulb
4.7 12×
RETLUX RLL 298 G4 3,5 W LED 12V WW
LED Bulb - lamp cap G4, power input 3,5 W, 12 V, luminous flux 380 lm, warm light (3000 K), diameter of 1,5 cm, lifespan 15000 h, energy label F, 1 piece in package
9.19 €
Buy
In stock > 20 pcs
Order Code: RTLX22_005
Philips Hue White and colour Ambiance 6W 810 E27 4pcs - LED Bulb
3 variants
Philips Hue White and colour Ambiance 6W 810 E27 4pcs
LED Bulb - smart, lamp cap E27 - lamp cap E27, power input 6 W, 230 V, luminous flux 800 lm (1000 K), Bluetooth, compatible with Apple Home, Google Home, Philips Hue, control via app in both Czech and English, lifespan 25000 h, energy label D, 4 in package
169.90 €
Buy
In stock > 5 pcs
Order Code: PHLS25085
Govee Smart RGBWW 4,8W-50W 400lm GU10 Long Life 2pcs Matter - LED Bulb
4.1 12×
Govee Smart RGBWW 4,8W-50W 400lm GU10 Long Life 2pcs Matter
LED Bulb - smart, lamp cap GU10 - lamp cap GU10, power input 4,8 W, 230 V, luminous flux 400 lm, adjustable light temperature (2700-6500 K), diameter of 5 cm, WiFi 2,4 GHz and Bluetooth, compatible with Apple Siri shortcuts, Google Home, GOVEE Home, control via app in English, lifespan 25000 h, energy label F, 2 in package
18.90 €
Buy
In stock > 10 pcs
Order Code: Govee24037
AlzaPower LED 12-100W, E27, 2500K, Amber Filament, 1 pc - LED Bulb
4.4 22×
AlzaPower LED 12-100W, E27, 2500K, Amber Filament, 1 pc
LED Bulb - lamp cap E27, power input 12 W, 230 V, luminous flux 1521 lm (2500 K), diameter of 9,7 cm, lifespan 25000 h, energy label E, 1 piece in package
Buy with code ALZADAYS30DE The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Erhalten Sie 30 % Rabatt mit dem Code ALZADAYS30DE. Das Angebot gilt bis zum 15. September 2025 oder solange der Vorrat reicht und ist nur für Endverbraucher bestimmt. 3.63 €
Great price 5.19 €
Buy
In stock > 20 pcs
Order Code: APWLED-0017
RETLUX RLL 419 GU10 bulb 9W DL - LED Bulb
6 variants
4.1 72×
RETLUX RLL 419 GU10 bulb 9W DL
LED Bulb - lamp cap GU10, power input 9 W, 230 V, luminous flux 820 lm, cool light (6500 K), diameter of 5 cm, lifespan 25000 h, energy label F, 1 piece in package
Discounted -25 % 3.99 € 5.39 €
Buy
In stock > 10 pcs
Order Code: RTLX17146
WiZ Tunable White 60W E27 G120 Filament - LED Bulb
4.0 5×
WiZ Tunable White 60W E27 G120 Filament
LED Bulb - smart, lamp cap E27 - lamp cap E27, power input 7 W, 230 V, luminous flux 806 lm, adjustable light temperature (2700-6500 K), diameter of 12,5 cm, WiFi 2,4 GHz, compatible with Samsung SmartThings, IFTTT, control via app in both Czech and English, lifespan 15000 h, energy label E, 1 piece in package
19.90 €
Buy
In stock > 5 pcs
Order Code: WiZ21019
Solight LED bulb miniglobe E14 6W 3000K - LED Bulb
4.8 62×
Solight LED bulb miniglobe E14 6W 3000K
LED Bulb - lamp cap E14, power input 6 W, luminous flux 510 lm, warm light (3000 K), diameter of 4,5 cm, energy label F, 1 piece in package
1.99 €
Buy
In stock > 50 pcs
Order Code: SD078u
Philips Hue Essential White and colour Ambiance 4,7W 345 GU10 Starter Kit - LED Bulb
1.0 1×
Philips Hue Essential White and colour Ambiance 4,7W 345 GU10 Starter Kit
LED Bulb - smart, lamp cap GU10 - lamp cap GU10, power input 4,7 W, 230 V, luminous flux 345 lm (2200 K), Bluetooth, compatible with Apple Home, Google Home, Philips Hue, control via app in both Czech and English, lifespan 15000 h, energy label F, 3 in package
99.90 €
Buy
In stock > 5 pcs
Order Code: PHLS25095
AlzaPower LED 12-85W, E27, 4000K, set of 3 - LED Bulb
4.9 318×
AlzaPower LED 12-85W, E27, 4000K, set of 3
LED Bulb - lamp cap E27, power input 12 W, 230 V, luminous flux 1160 lm, neutral light (4000 K), diameter of 6 cm, lifespan 25000 h, energy label F, 3 in package - 2.16 €/ks
Great price 6.49 €
Buy
In stock > 10 pcs
Order Code: APWLED-0005
TESLA LED BULB, G9, 4W, 400lm, 4000K Daylight White - LED Bulb
3 variants
4.5 60×
TESLA LED BULB, G9, 4W, 400lm, 4000K Daylight White
LED Bulb - lamp cap G9, power input 4 W, 230 V, luminous flux 400 lm, neutral light (4000 K), diameter of 1,8 cm, lifespan 25000 h, energy label F, 2 in package - 4.05 €/pcs
8.09 €
Buy
In stock > 10 pcs
Order Code: TslLigh22_07
RETLUX RLL 621 R50 E14 Spot 6W WW D - LED Bulb
3 variants
4.4 20×
RETLUX RLL 621 R50 E14 Spot 6W WW D
LED Bulb - lamp cap E14, power input 6 W, 230 V, luminous flux 810 lm, warm light (3000 K), lifespan 25000 h, energy label D, 1 piece in package
Discounted -20 % 3.19 € 3.99 €
Buy
In stock > 20 pcs
Order Code: RTLX24046
EMOS Classic Mini Globe, E14, 4.2 W (40 W), 470 lm, cool white - LED Bulb
9 variants
4.8 96×
EMOS Classic Mini Globe, E14, 4.2 W (40 W), 470 lm, cool white
LED Bulb - lamp cap E14, power input 4,2 W, 230 V, luminous flux 470 lm, cool light (6500 K), diameter of 4,5 cm, lifespan 30000 h, energy label E, 1 piece in package
Great price from  1.98 €
Buy
In stock > 10 pcs
Order Code: EMOS24110
EMOS Classic MR16, GU10, 7 W (60 W), 806 lm, warm white, 3 pcs - LED Bulb
10+ variants
4.8 212×
EMOS Classic MR16, GU10, 7 W (60 W), 806 lm, warm white, 3 pcs
LED Bulb - lamp cap GU10, power input 7 W, 230 V, luminous flux 806 lm, warm light (3000 K), diameter of 5 cm, lifespan 30000 h, energy label E, 3 in package - from 2.88 €/ks
from  8.63 €
Buy
In stock > 10 pcs
Order Code: EMOS24117
MOES Matter Wi-Fi Bulb, RGB + CW, 10W, E27 - LED Bulb
4.3 18×
MOES Matter Wi-Fi Bulb, RGB + CW, 10W, E27
LED Bulb - smart, lamp cap E27 - lamp cap E27, power input 9 W, 230 V, luminous flux 806 lm, adjustable light temperature (2700-6500 K), diameter of 6 cm, WiFi 2,4 GHz, compatible with Apple Home, Tuya, Samsung SmartThings, Manufacturer app, control via app in both Czech and English, lifespan 25000 h, energy label F, 1 piece in package
9.59 €
Buy
In stock > 10 pcs
Order Code: Moes2403
WiZ Tunable White 50W E27 G120 Vintage - LED Bulb
5.0 2×
WiZ Tunable White 50W E27 G120 Vintage
LED Bulb - smart, lamp cap E27 - lamp cap E27, power input 6,7 W, 230 V, luminous flux 640 lm, adjustable light temperature (2000-5000 K), WiFi 2,4 GHz, compatible with Samsung SmartThings, IFTTT, control via app in both Czech and English, lifespan 15000 h, energy label F, 1 piece in package
20.90 €
Buy
In stock 3 pcs
Order Code: WiZ21025
WiZ colours 50W GU10 - LED Bulb
5.0 3×
WiZ colours 50W GU10
LED Bulb - smart, lamp cap GU10 - lamp cap GU10, power input 4,9 W, 230 V, luminous flux 400 lm, adjustable light temperature (2200-6500 K), WiFi 2,4 GHz, compatible with Samsung SmartThings, IFTTT, control via app in both Czech and English, lifespan 15000 h, energy label F, 1 piece in package
13.90 €
Buy
In stock > 10 pcs
Order Code: WiZ21012
EMOS Filament A60 / E27 / 10.5 W (100 W) / 1521 lm / neutral white - LED Bulb
10+ variants
4.8 414×
EMOS Filament A60 / E27 / 10.5 W (100 W) / 1521 lm / neutral white
LED Bulb - lamp cap E27, power input 10,5 W, 230 V, luminous flux 1521 lm, neutral light (4000 K), diameter of 6 cm, lifespan 25000 h, energy label D, 1 piece in package
from  4.94 €
Buy
In stock > 10 pcs
Order Code: EMOS24156
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Light Bulbs & Fluorescent Lights

Alza Days LED Bulbs LED bulbs Light Bulbs & Fluorescent Lights Sorted by Socket by Socket Fluorescent Tube Lamps Fluorescent Tubes Smart Light Bulbs Light Sources Efficient Lamps Efficient Spotlight Bulbs Spotlight Oven Light Bulbs Oven Vintage & Retro Light Bulbs Retro Light Bulb Value Packs Value Packs AlzaPower Light Bulbs & Fluorescent Lights AlzaPower Jak vybrat žárovku
 

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