bulbs

[Costas]

Device accepts 2 lamps of type E27 + E14

Always the watts written for Incandescent bulb. So when dealing with LED bulbs,

for E14, this LED 4.9watts equals (in lumens) with Incandescent bulb 40watts
nevertheless, as per specs, the device outputs 40w, you can go up to LED 20watts (~2k lumens)

for E27,

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always choose Warm White.

Yellow (aka warm) light, can cause a decrease in contrast and make it harder to read small text. I experience this after 1 year of use.

When it comes to reading, it is generally recommended to use a white or natural light source rather than a blue or yellow bulb. Blue light has a higher color temperature and can cause eye strain and fatigue over prolonged periods, especially in low-light conditions.

For optimal reading conditions, it is best to use lighting that closely mimics natural daylight. This is usually achieved with bulbs that emit white light or have a color temperature around 5000-6500 Kelvin, which provides a neutral and balanced illumination.

Types of color :

1. Warm White (2700K-3000K): This color temperature range produces a soft, warm, yellowish-white light similar to traditional incandescent bulbs. It creates a cozy and relaxing atmosphere, often used in living rooms, bedrooms, and restaurants.
2. Soft White (3000K-3500K): This color temperature is slightly cooler than warm white but still emits a warm and inviting light. It is commonly used in residential settings, such as kitchens, bathrooms, and hallways.
3. Neutral White (3500K-4000K): This color temperature falls in the middle range, providing a balanced and natural white light. It is often used in commercial spaces, offices, retail stores, and garages.
4. Cool White (4000K-5000K): This color temperature emits a bright and crisp white light with a slightly bluish tone. It is commonly used in task-oriented environments, such as workshops, offices, and kitchens.
5. Daylight (5000K-6500K): Daylight bulbs simulate natural daylight and provide a bright, clear light. They are often used in areas where color accuracy is crucial, such as art studios, photography studios, and hospitals.
6. Bright White (6500K and above): Bright white bulbs emit a very cool, bluish-white light. They are commonly used in industrial and outdoor applications, such as warehouses, stadiums, and street lighting.
7. Cool Daylight (6500K): It is a type of light that closely resembles natural daylight, often described as a bright, cool, and bluish-white light. Cool daylight bulbs are designed to mimic the color temperature of midday sunlight.

OSRAM known also as LEDVANCE

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Types of bulb :

• Light-Emitting Diode (LED)
• Incandescent
• Compact Fluorescent (CFL)
• Halogen

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OSRAM.PARATHOM Retrofit CLASSIC 11 W/827 E27 (11w)
1521 lumens (equal with 100w)

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New EU energy labels applicable from 1 March 2021

sample product declared to EU database, find yours here.​

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Calculate how many lumens your space needed (linear feet 30cm)
https://www.waveformlighting.com/lumen-calculator
https://www.omnicalculator.com/everyday-life/lighting

Lumens to watts calculator
https://www.rapidtables.com/calc/light/lumen-to-watt-calculator.html
https://lamphq.com/lumen-watt-conversion/

The anatomy of a smart bulb
https://cheriches.com/smart-home/2023-10-07-the-anatomy-of-a-smart-bulb.html