Smart Bulbs, Manage the Personas, and Enjoy the Lighting Theme!

VIBGYOR is the acronym that we all are familiar with. It represents the seven colors in a rainbow viz. Violet, Indigo, Blue, Green, Yellow, Orange, and Red. You are aware that the sunlight on refraction at fine water droplets in the cloud splits into a band of these colors. We also observe the same phenomenon when the light passes through a glass prism and forms a similar band of light rays.

VIBGYOR showcases a sequence of visible light waves also called the Visible Light spectrum with increasing wavelengths ranging from 380 nm to 750 nm, and decreasing frequencies ranging from 790-405 THz from Violet to Red.

You can further divide the visible light spectrum into smaller sub-segments. Each sub-segment will also be a band of waves having nearby wavelengths and unique, but, closely related colors. The color of the dominant wavelength in the band is termed, Hue. In the visible spectrum, the band with the shortest wavelengths is represented by the Violet Hue (380 nm to 450 nm), and the one with the maximum wavelength is depicted by the Red hue (625 nm to 740 nm).


Frequency, which is a fundamental parameter of waves bears an inverse relationship with the wavelength. Hence, the Violet hue band with minimum wavelengths has the maximum frequency range (680 THz to 790 THz) and the Red hue sub-segment with the maximum wavelengths has the minimum frequency range (405 THz to 480 THz).


visible light spectrum supported by smart bulbs

Further, the energy associated with waves is directly proportional to their frequency, so the Violet rays carry maximum Photon Energy (2.95 eV-3.10 eV) and Red light frays carry minimum photon energy (1.65 eV-2.00 eV).

One more aspect to consider is that a light source emits lower-frequency waves at lower temperatures and higher-frequency waves at higher temperatures. Hence, with the increase in filament temperature, an electric bulb will emit red light at 2000K, Yellow light at 3000K, and Blue light at 9000K.

The Wavelengths, Frequencies, and photon energy of each of the above waves are given below for your reference:

ColourWavelengthFrequencyPhoton Energy
Violet380-450 nm680-790 THz2.95-3.10 eV
Indigo450-485 nm620-680 THz2.64-2.75 eV
Blue485-500 nm600-620 THz2.48-2.52 eV
Green500-565 nm530-600 THz2.25-2.34 eV
Yellow565-590 nm510-530 THz2.10-2.17 eV
Orange590-625 nm480-510 THz2.00-2.10 eV
Red625-750 nm405-480 THz1.65-2.00 eV

In the above context, you may also find it interesting to learn certain features of light viz. Saturation, Brightness, and Temperature. You might already be familiar with these features and using them while you optimize the visuals on your TV, LCD Projectors, Desktops, Laptops, Mobiles, etc…


Saturation of a composite light ray w.r.t. a particular color is the proportion of that color in that composite (a club of multiple hue bands) light ray. Hence, 100% Colour ‘X’ wave and no mixing of any external color wave mean full saturation, 0% Colour ‘X’ and 100% external color means full unsaturation, and partial saturation of any band varies with the proportions of X and external color waves in that band/composite ray.

In the case of partial saturation, the external colors can be White representing the sunlight, Black representing the darkness, and Grey a mix of darkness & sunlight. From the perspective of light, saturation is given in terms of white light mixed with the particular wave hue under consideration.

The set of various saturation combinations resulting from the mixing of White color with the said hue is called Tints. Similarly, the set of various saturation combinations resulting from the mixing of Black and Grey with the said hue are called Shades and Tones respectively.


Brightness refers to the intensity of light. More wattage of light sources means extra energy, higher intensity, increased luminosity, added lux, and larger sensation to the eyes of the observers. The apparent brightness in the observers’ eyes also depends upon the distance between the source and the observer. The more the distance less will be apparent brightness observed by the eyes.


Colors in the red area of the color spectrum like Red, Orange, and Yellow including their variations are considered warm colors; whereas, Colours on the blue side of the spectrum like Violet, Indigo, Blue, and Green are termed cool colors. This color temperature consideration is merely a representation that is influenced by human psychology and archaic associations of the colors of Blood, Fire, Sunrise, Sunset, etc. with being Hot/Warm.

Technically the photon energy of Red and Yellow colors are lesser than the photon energy of Violet and Blue colors. The Blue light is more stimulating and the yellow is more relaxing. You may observe that the colors with higher wavelengths are referred to as warm and colors with lower wavelengths are termed cool colors. So any color ‘Y’ is cooler than all the other colors which have higher wavelengths than that of the color ‘Y’.

Effect of Colours on Human Biological Processes

Light influences the physical, psychological, and sociological aspects of human lives. In the human body, light is detected by the photoreceptor cells in the eye retina. Special neurons called Gangalion cells process these visual sensations; add intelligence to them regarding stimulus size, color, movement, etc… This information is then transmitted to the hypothalamus in our brain through the neural network.

Endocrine System

The endocrine system is the network of glands in our body like the Pituitary gland, Pineal gland, Thyroid gland, Adrenal gland, etc. These glands produce distinct hormones which are special chemicals and have distinct meanings and messages for different body organs/parts. Hormones through bloodstreams deliver instructional signals to various organs, skin, muscles, and other tissues, thereby participating in regulating circadian rhythms like physical, mental, and behavioral changes that follow a 24-hour cycle including our mood, digestion, and sleep.


The Hypothalamus regulates the endocrine system and is also considered a link structure between the nervous system and the endocrine system. Hypothalamus is responsive to light signals coming from the eyes through the neural network. It analyses the visual information and context about light characteristics i.e. Hue, Brightness, Saturation, Temperature, etc., and instructs different glands (through neurotransmitter hormones) to release/suppress different hormones into the bloodstream. The responses of different body parts to these signals impact our body processes like cognition, emotions, and behavior.

For example, based on the low brightness and warm yellow lighting conditions, which represent late evening/night, Hypothalamus sends the cue, in the form of neurotransmitters, to the Pineal gland to prepare the body for sleep. The gland produces and secretes Melatonin in the bloodstream.


Melatonin is the hormone that manages the sleep-wake cycle in our body. The hormone instructs different body parts to make adjustments in temperature, blood pressure, alertness, and other biological processes to facilitate sleeping or waking. Melatonin secretion peaks at night and declines during the day.

Similarly, exposure to blue light wavelengths stimulates the production of Serotonin and Dopamine hormones in the Hypothalamus. 


Serotonin is a key hormone that regulates our mood, focus, happiness, calmness/anxiety, and social behavior. It also helps in certain circadian functions like sleep, appetite, and digestion. This hormone impacts our entire body including the effectiveness of the neural network.


Dopamine is another neurotransmitter that affects our cognition and behavior.  It stimulates feelings of pleasure and reward and is hence critical to our mood, motivations, attention, learning, and sleep too.

We all human beings across the globe have similar physical anatomy, biological features, and processes. Also light bears majorly similar characteristics everywhere in the world, hence, light triggers certain common stimulations in humans across the countries, however at the same time, due to diverse archaic associations, cultures, religious practices, signs, symbols, and meanings, we have developed different interpretations and responses towards various factors including colors and lights.

So, colors/lights may bear different meanings/personas in different cultures and evoke different emotions and feelings in the people of different countries.

The Different Personas Around Us

Personas are the associations that you attach with different things. You can create different expressions and values by the amalgamation of different personas together to deliver a mixed and modified meaning triggering vivid emotions and feelings.

Keeping our discussion around lighting theme optimization and effectiveness only, we will consider the personas which are relevant to the subject and detail them with applications.

Color Persona

It can be considered as the combined effect of the individual personas of individual light characteristics like Hue, Brightness, Saturation, and Temperature.

  • Red: Passion, Love, Anger
  • Orange: Energy, Happiness, Vitality/change
  • Yellow: Happiness, Hope, Positivism
  • Green: New Beginnings, Abundance, healing
  • Blue: Calm, Responsible, Sadness
  • Purple: Creativity, Royalty, Wealth
  • Black: Mystery, Elegance, Evil
  • Gray: Moody, Conservative, Formality
  • White: Purity, Cleanliness, Virtue
  • Brown: Nature, Wholesomeness, Dependability
  • Tan or Beige: Conservative, Piety, Dull
  • Cream or Ivory: Calm, Elegant, Purity
Brightness (Intensity)
  • High Brightness: High energy, larger sensation, more alertness
  • Medium Brightness: moderate energy, moderate sensation, moderate alertness
  • Low Brightness: less energy, lean sensation, more Calmness, less aggression
  • High Saturated Tint: High Stimulation, High attention, Richness, Masculine feeling
  • Medium Saturated Tint: Moderate arousal, Mild masculinity, Medium attention
  • Low Saturated Tint (Pale): Low Stimulation, Feminine look, softness; however, in some instances pale may also indicate a masculine or gender-neutral look
  • Warm: Relax, Calmness, Love
  • Cool: Attentive, Focused, Productive

Occasion Persona

  • Holi: Cheerfulness, Vivid, Vibrant
  • Eid Ul Fitr: Happiness, Sharing, Smiles
  • Rakshabandhan: Affection, Commitment, Responsibility
  • Janmashtmi: Joyfulness, Passion, Celebrations  
  • Ganesh Chaturthi: Prosperity, Growth, New beginnings
  • Durga Puja: Sacrifice, Togetherness, Spark
  • Dussehra: Passion, Success, Courage
  • Diwali: Happiness, Hopes, Values
  • Christmas: Joy, Warmth, New beginnings
Special Days
  • Independence Day: Courage, Passion, Pride
  • Republic Day: Growth, Hopes, Courage
  • Teacher’s Day: Values, Growth, Wisdom
  • Children’s Day: Joy, Knowledge, Development
  • Mother’s Day: Sacrifice, Humble, Dedication
  • Week Ends: Relaxation, Enjoyment, Togetherness

Place Persona

  • Home Office: Productivity, Focus, Energy
  • Living Room: Comfort, Richness, Luxury
  • Bed Room: Relaxation, convenience, Rejuvenation
  • Puja Room: Calmness, Devotion, Satisfaction
  • Kitchen: Love, Duty, Focus
  • Garden: Pleasure, Relax, Rejuvenation

Time Persona

  • Morning: Action, Excitement, Goals
  • Afternoon: Activeness, Efforts, Target
  • Evening: Satisfaction, Fatigue, Anxiousness
  • Night: Relaxation, Content, Love

Person Persona

  • Man: Aggression, Masculinity, Gentleness   
  • Women: Dedication, Care, Affection
  • Boy: Smartness, Sporty, Motivation
  • Girl: Sweetness, Sensitivity, Helpfulness 
  • Old: Wisdom, Knowledge, Experience
  • Kids: Agility, Vibrance, Smartness  

We have included three general associations for each of the aspects/constituents of the different personas viz. Colour, Occasion, Place, Time, Person personas. You can define each of the above factors with many more traits depending upon your knowledge, personal experiences, and situational awareness.

Each of the instances, where you want to create a lighting theme can be a combination of each persona with a different set of constituent factors. Hence you may be able to create thousands of scenarios for thousands of opportunities.

Here, we will consider one use case and create lighting themes for each of the target combinations to demonstrate the methodology. You can follow and customize the sets as per your requirements and objectives.

We will define the target occasion, Place, Time, and Person first and then select the appropriate lighting characteristics matching the scenario and satisfy your purpose.

Smart Bulbs for Smart Lighting Themes

Your lighting color requirements and choices can be unlimited depending upon your innovative ideas, sense of colors, and the purpose of lighting. Hence, you may consider Smart Bulbs which provide 16 million colors in a single Smart bulb along with suitable adjustments in brightness and saturation values.

You can purchase Smart bulbs of good Brands from the market easily. Smart Bulbs come with a 1-2 years warranty and are available at quite cheap rates also. Also, you can operate them through your mobile phone and voice commands to Voice Assistants which you may have in your Smart homes.

Lighting Themes Use Case

  • Target Occasion: Independence Day, August 15, 2021
  • Place: Living Room
  • Time: Morning and Evening
  • Person: Kids
  • Factors to Select: Light Hue(s), Saturation, Brightness, and Temperature
Hue Selection

The occasion under consideration is India’s Independence Day which has associations of Courage, Passion, and Pride that we attach to our nation. Hence you may prefer to consider the three colors of our National Flag for the lighting theme. Hence, the choice of Hue would be Saffron, Green, and White. 

You can install three different Smart Bulbs to create the theme or you can use a single smart bulb with appropriate color sequence settings in the mobile app to obtain the desired theme output. Kindly consider that you can easily adjust the light hues in the Smart Bulbs and obtain the exact hues of your choice.

You may fix the smart bulbs in the overhead Chandelier in your living room if you have one, or else you can use other electrical fixtures that you have in your room like Lamp Shades, Wall mountings, etc. You can also select a suitable section of your room like an appropriate corner or wall of the room to project the lights, depending upon the possibility and your choice.

As you have observed Living room has associations of comfort, richness, and luxury. You may select full saturation for all three colors initially. The kids represent Agility and Vibrance and generally prefer relatively medium to high light brightness. Hence, you can adjust the Brightness to a High Level in the morning say at 9:00 AM. This would trigger the release of Serotonin and Dopamine in the body, so the kids and family will feel more alert and active, which will gel with the occasion and time personas very well. 

As another opportunity to enjoy luxury and feel the excitement, you and your kids can operate the bulbs using your voice commands to voice assistants such as Alexa configured with the smart bulbs.

Factor Adjustments

You may reduce Brightness to Medium level during the afternoon say at 1:00 PM. The kids would enjoy both the variations and experience reduced levels of Serotonin which will make them more relaxed. Further, in the Evening say at 6:00 PM, you can adjust the bulb’s Brightness to low, saturation to medium so as to give a pale tint, and also set the temperature settings towards warm. This combination will trigger Melatonin to flow in the body and create a mood of calmness. Kids and other family members can enjoy the special meal in a supportive environment which will positively influence other metabolic activities as well.

After the meal, you may wish to enjoy a patriotic movie on the TV along with your family in the living room itself. Depending upon the TV Visuals and your preference, you may switch off the Saffron and Green color bulbs keeping the White with Warm Yellow settings ON, or else you may continue with all three bulbs ON with low Brightness, low saturation, and more warm temperatures. The excitement from the movie would be balanced by the warmer lighting conditions in the room.

Smart Bulb Selection and Consideration

You can buy Smart Bulbs with suitable wattage (9W, 10W, 11W, 12W, 14W, 20W, etc.) to meet the Brightness requirements of the lighting theme according to your room size. You can also refer to product specifications and app features for brightness, saturation, and temperature controls.

One crucial aspect related to lighting and its impact on human beings is that artificial light illuminations at home and around, which are against the circadian cycle, can cause hormonal imbalance and health issues to us. Hence, the selection and scheduling of light themes should be done cautiously.

The inspiration can be taken from the Sun, which is warmer at Dawn, attains peak brightness at noon, and then again slowly moves towards warmer colors at Dusk, leaving behind a good time for relaxation and rejuvenation to be ready for another day full of excitement, balance, and achievements.

4 thoughts on “Smart Bulbs, Manage the Personas, and Enjoy the Lighting Theme!”

  1. Fantastic post on smart bulbs and theme settings. The concept of persona management is unique and very relevant.

  2. Really an Intelligently written article on IntelliPost. Physics, Biology and Behavioral sciences have been connected beautifully…..

  3. Great! I will use this knowledge and set a Smart Bulb theme on this Rakshabandhan….Also please create themes for Durga Puja, Dusshera, Diwali etc..


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