Spectrum
The full mix of colors in each light, from blue to deep red. Shows what a bulb's label doesn't.
Home Light Reset
Circadian Lighting Assessment in Fort Collins and Across Colorado
$35090 min on site · report within 4 days
Better sleep, energy and focus start with light.
Dr. Jack Kruse calls light the master regulator of human biology. FieldWise EMF Consulting measures the light in your home room by room, including spectrum, flicker and melanopic light, then hands you a simple plan you can put in place in a weekend. Research has found that ordinary room light at night can cut melatonin by more than 70%.
Is this for you?
For anyone who wants to feel better at home
Lighting is the easiest change in the house, and often the one with the biggest payoff. It's a great fit if any of these sound familiar.
Trouble winding down or sleeping
Afternoon energy crashes
Tired eyes by the end of the day
A home office you work from all day
Kids' bedrooms and homework spaces
A house full of new LED bulbs
Why light matters
Why does the light in my home matter so much?
Your body keeps time with light. Bright, full spectrum light in the morning tells it the day has started. Dim, warm light after sunset tells it to wind down and get ready for repair.
Most modern LEDs send mixed signals. Many carry a strong blue spike, very little deep red, and flicker you can't see. Dr. Jack Kruse calls light the master regulator of human biology, which makes the light you live under every evening one of the most important signals your body gets.
The good news: light is the easiest thing in the house to fix. The right bulbs in the right rooms, and a few evening habits, can change how your home feels in a weekend.
Think of light as food.
Sunlight is a home cooked meal: complete and balanced. Many LEDs are fast food: they fill the room, but they're missing the good stuff and heavy on what you don't need at night. The Home Light Reset reads the label on every light in your home.
What the research shows
Ordinary room light at night can cut melatonin by more than 70%
Blue light at night tells your body it's still daytime. Melatonin, the hormone that should rise after dark, gets held back. Here's what researchers have measured.
73.7%
Median melatonin suppression when ordinary room light (under 200 lux) stayed on through the night.
Gooley et al., 2011 190 min
How much room light before bed shortened the body's nightly melatonin window, compared with dim light.
Gooley et al., 2011 148%
Of homes measured had evening lighting bright enough to suppress melatonin by an estimated 50%. Energy efficient lighting delivered nearly double the circadian signal of incandescent.
Cain et al., 2020 2Melatonin is much more than a sleep hormone. Research describes it as a powerful antioxidant that directly neutralizes free radicals and boosts the body's other antioxidant defenses 3. It's often called the body's master antioxidant, and it does its best work at night, while you sleep.
The effects cascade. Your body clock doesn't just time sleep. It schedules the daily rhythm of other hormones too, like cortisol. When bright evening light keeps telling your brain it's daytime, that clock can drift later night after night, and everything it coordinates drifts with it.
That's why the Home Light Reset focuses so much on your evenings and bedrooms. It's where the smallest changes make the biggest difference.
Think of melatonin as the night shift.
It's a cleanup crew that only clocks in when the lights go down. Bright, blue heavy light at night is like flipping the lights back on: the crew goes home early, and the cleanup doesn't get finished.
- Gooley JJ, et al. Exposure to room light before bedtime suppresses melatonin onset and shortens melatonin duration in humans. Journal of Clinical Endocrinology & Metabolism, 2011. Read the study
- Cain SW, et al. Evening home lighting adversely impacts the circadian system and sleep. Scientific Reports, 2020. Read the study
- Reiter RJ, et al. Melatonin as an antioxidant: biochemical mechanisms and pathophysiological implications in humans. Acta Biochimica Polonica, 2003. Read the abstract
What gets measured
Five things your light can't hide from a spectrometer
Every reading is taken with the UPRTek MK350S Premium spectrometer, room by room.
Flicker
How much a light pulses on and off each second, even when it looks perfectly steady.
Melanopic lux
How strongly a light signals "daytime" to your body clock. The key number for evenings.
Brightness and color temperature
Lux and CCT, so each room gets the right amount of light for the time you use it.
Color quality
Color rendering (CRI), how natural skin, food and rooms look under each light.
Real readings
What the spectrometer shows
Actual readings from FieldWise visits. Click any image to see it full size.
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What's included
Everything you get for $350
Room by room light measurements
Spectrum, flicker, melanopic lux, brightness, color temperature and color quality in the rooms that matter most.
Written report with prioritized changes
What each light is doing, and what to change first. Delivered within 4 days.
Action plan call
We go through your report together until every number makes sense. Most calls run 30 to 60 minutes.
Room by Room Bulb Spec
Target color temperature, color rendering and flicker level for each room, so you can shop with confidence anywhere.
Evening Light Plan
Simple changes for after sunset that support winding down and sleep.
Every reading is personally reviewed. After your visit, about 90 minutes goes into going through your readings room by room, interpreting them against Building Biology SBM-2015 guidelines and building a prioritized plan specific to your home.
How it works
From first call to a better lit home
- 1
Free 15 minute call
We talk about how you use your home and what you'd like to feel different.
- 2
Measurement in your home
About 90 minutes, room by room, with the spectrometer.
- 3
Your written plan
Delivered within 4 days, with your bulb spec and evening plan.
- 4
Action plan call
We go through it together, then you make the changes, often in a single weekend.
Home Light Reset
$350
90 min on site · report within 4 days
Includes the Room by Room Bulb Spec and Evening Light Plan
Step 1: Free Call (970) 436-761120% deposit ($70) reserves your date. Balance due when the assessment is complete.
Our promise
The Remeasure Guarantee
If you complete a change I recommend and the reading in that room doesn't measurably improve, I'll come back within 90 days and remeasure it at no charge.
Also concerned about EMF? The Foundational Assessment includes this entire Home Light Reset at no extra cost, plus all four types of EMF.
Questions
Home Light Reset questions
Does home lighting really affect melatonin?
Yes. In a study published in the Journal of Clinical Endocrinology and Metabolism, ordinary room light under 200 lux suppressed melatonin by a median of 73.7% when left on overnight. A 2020 study in Scientific Reports found nearly half of homes measured had evening lighting bright enough to suppress melatonin by an estimated 50%.
What is LED flicker, and why measure it?
Many LED bulbs switch on and off, or dim and brighten, more than a hundred times every second. It is too fast to see, but it shows up clearly on a spectrometer. Flicker has been associated with eye strain and headaches in sensitive people, and low flicker bulbs are easy to find once you know which rooms need them.
Will I need to replace all my lights?
Usually not. Your plan is prioritized, so most people start with the bedroom, the rooms they use in the evening and a home office. Many changes are free, like switching which lamps you use after sunset.
Do you sell bulbs?
No. Your Room by Room Bulb Spec lists the target color temperature, color rendering and flicker level for each room, so you can shop anywhere. You can also see the gear I use myself on the What I Use page.
Can you measure phone, tablet and TV screens?
Yes. Screens can be measured during the visit, so you can see the spectrum of the devices your family uses most, especially in the evening.
Is this the same lighting assessment included in the Foundational?
Yes. The Foundational Assessment includes the full Home Light Reset at no extra cost, plus all four types of EMF. If you are also curious about EMF, the Foundational is the better value.
How long does the Home Light Reset take?
About 90 minutes in your home. Your written report arrives within 4 days of the visit, then we schedule your action plan call.
Want to learn more first? Read the light spectrum guide, or compare all assessments.
Booking details
Scheduling and policies
Travel fee
A travel fee may apply outside the Front Range, based on location and scheduling.
Cancellation policy
Life happens, and rescheduling is easy. Each assessment reserves time on my calendar that no one else can book. With at least 24 hours notice, your deposit moves to your new date. Cancellations or missed appointments with less than 24 hours notice forfeit the deposit.
Deposit
A 20% deposit ($70) reserves your date. The balance is due when the assessment is complete.
Payment
Accepted at booking and at completion:
Step 1: a free 15 minute discovery call
Tell me how you use your home and how you'd like it to feel. I'll tell you honestly whether the Home Light Reset or the Foundational is the better fit.
Step 1: Free Call (970) 436-7611Prefer to write? Send a message or email info@fieldwiseemf.com