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How to Charge a Solar Watch Fast? [Can a Lightbulb Charge It?]

Tim Carter
Written by Tim Carter Last Updated: July 15, 2022

Many solar watch owners experiment with alternative charging techniques. Although you can simply charge your solar watch with natural sunshine, there might be a situation when you won’t have access to natural sunlight to recharge your solar watch. So how to charge a solar watch fast?

The fastest way to charge a solar watch is by exposing it to direct sunlight for a certain period as instructed by the manufacturer of your solar watch. Another best way to charge a solar watch fast is by exposing it to LED lights. 

As long as the artificial light emits the same wavelengths of light as sunshine, the solar cell will generate electricity in the same manner that it would when exposed to direct sunlight.

When artificial light shines on solar cells, the solar cell can reflect it, absorb it, or let it pass through it.

Solar cells try to minimize the quantity of light that passes through or bounces off of them to generate full potential energy.

Table of Contents

How to Charge a Solar Watch Fast?

All solar watches need sunlight to charge their batteries and ensure their excellent performance.

Exposing your watch to sunlight is the best way to keep your watch running flawlessly for years.

However, you might find yourself at a specific location that doesn’t receive enough sunlight or you are in a hurry and don’t have the time to remove your watch from your wrist and let it fully charge.

What happens then?

That is when you can use the LED light to charge your watch.

Anyway, other types of light will also charge your watch, but none of them is as efficient as direct sunlight.

Seiko solar watch charging time table comparison

Is Brightness of the Light Important When Charging a Solar Cell?

The amount of light that shines on a solar cell is measured as brightness or luminosity.

A solar cell cannot generate electricity in darkness, but the current grows as the brightness of light increases.

After a certain level of brightness, the cell’s output approaches a limit.

After that limit, the brightness of the light doesn’t provide any additional benefits.

The parameters of a solar cell include a nominal voltage and current rating, which represent the cell’s output under direct sunlight.

To get the most out of a solar panel, the panel should face the sun as directly as possible.

For that reason, solar installers position a panel so that it could capture most of the sun’s rays.

However, when it comes to charging small solar gadgets such as watches or calculators, artificial light works as well.

Because artificial light sources such as incandescent and fluorescent lights resemble the spectrum of the Sun, they can power small gadgets.

Other artificial sources, such as lasers and neon lamps, have a relatively limited color spectrum, therefore solar cells may not function as well with their light.

What Should I Know about Lightbulbs?

When replacing light bulbs around the house, you may not care which bulbs to buy. You may pay attention to the wattage but disregard the color or the temperature of the lights. You may prefer one color over the other.

The color of the lighting you install is important. Different colors and different brightness levels have different purposes.

The lumen rating of a light bulb shows the brightness of the bulb. The problem is subjectiveness when determining the brightness of a space.

The effectiveness of a light bulb is determined by the size of the room, wall colors, light placement, and other factors. Consider all these factors when deciding which light bulb to buy.

LED bulbs consume more than 75% less energy than incandescent bulbs.

The discrepancy is considerably more pronounced at low power levels.

A bulb’s wattage is the amount of power it consumes.

Incandescent bulbs consume much more energy than LED bulbs, so we recommend opting for LED bulbs to save on your energy bill.

The color of the bulb is indicated by a Kelvin value (which is usually between 2,700 and 6,500) accompanied by a descriptor that denotes the hue, such as soft white, warm white, bright white, and daylight light.

The following is a breakdown of light bulb color temperature:

  • Soft white (2,700 to 3,000 Kelvin) is warm and yellow, similar to the color of incandescent lamps. It is good for living rooms, dens, and bedrooms.
  • Warm white (3,000 to 4,000 Kelvin) has a yellowish hue, good for kitchens and bathrooms.
  • Bright white (4,000 to 5,000 Kelvin) delivers color between white and blue tones, appropriate for workspaces and kitchens.
  • Daylight (5,000 to 6,500 Kelvin) is neutral. It increases color contrast, which makes it great for working and reading.

The best choice is to opt for smart LED lights that allow you to change the intensity and hue depending on your mood or needs.

How To Charge a Solar Watch using a LED Light Bulb?

Artificial lights like incandescent and LED lamps can charge solar cells if the light is powerful enough because of the specific range of light wavelengths found in both direct sunshine and artificial light.

As a result, either light source can charge the battery.

However, charging any solar-powered gadget during daylight is always far more efficient, as solar cells work even in cloudy weather.

Here’s how to use an LED light to charge your solar watch:

Most solar watches include an indication that shows the current charge level. You might even notice that the buttons are not working. If your charge icon is zero, your watch requires immediate charging.

Place your solar watch near the LED light. Smaller LED bulbs are the most effective and secure for a solar watch.

However, regardless of which LED light you choose, keep the solar watch at a 20-inch distance from the LED source.

Final Thoughts

The quickest way to charge a solar watch is to expose it to daylight and direct sun rays for the duration specified by the manufacturer of your solar watch.

Another effective method for quickly charging a solar watch is to expose it to LED lights because both direct sunshine and artificial light contain a specific range of light wavelengths.

However, the best you can do is expose your watch to sunlight.


Tim Carter
Tim Carter

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