Reviewed by Jack
I recommend this product
5 Stars
My meter works great thanks to the guys at build A soil
Loading...
Was this helpful?
Loading...
Lightray | SKU:
LIT101
PAR METER (PPFD): Lightray Diffuser & Cosine Corrector
Rated 4.9 out of 5
Regular price
$40.00
Unit price
PAR METER (PPFD): Lightray Diffuser & Cosine Corrector - 1 Unit is backordered and will ship as soon as it is back in stock.
Quality First
Quality First
BuildASoil is committed to sourcing the highest quality ingredients you can trust. over 10,000 Five Star Reviews and over a decade in business
Delivery and Shipping
Delivery and Shipping
Shipping Policy
Shipping is expensive, and it gets more expensive almost every year. We are not going to pretend otherwise. What we can tell you is that we work hard to find the most reliable and affordable way to get your order to you, and we pass along free shipping wherever it makes sense.
Free shipping on any order with two or more items. The one exception is bulk items, meaning the large or heavy products that have to move by freight or oversized parcel. If your cart qualifies, free shipping is applied automatically at checkout.
Why two items and not a dollar amount?
Most stores set free shipping at a dollar threshold. That works when you sell light things like clothing. We don't. We ship soil, amendments, and heavy real goods that are expensive and awkward to move, so a dollar minimum doesn't reflect what shipping actually costs us.
We are a small business with no outside financial backing, and we are not Amazon. We manufacture, pack, and ship everything in house so we can control quality, which means real people picking, boxing, taping, and labeling every order, and that means real jobs. When we ship a single item for free, the only way to cover it is to raise prices across the board, and we would rather not do that. Asking for two or more items on free orders lets us keep prices lower for everyone and keep shipping sustainable. We hate high shipping costs as much as you do, and this is the fairest way we have found to keep them down.
Delivery estimates
Every product page shows an estimated delivery window based on current fulfillment and carrier schedules, so you know what to expect before you buy.
Shipping Options
BuildASoil Shipping
Free
Free on eligible orders with two or more items. We select the carrier and method.
Standard Shipping
Paid
Standard ground service.
Standard Shipping: Rushed Out the Door
Paid, slightly more
Same standard transit, but we push it out the door the same day when we can.
Get It Fast
Higher
Prioritized fulfillment with faster transit.
Overnight It
Highest
The fastest option we offer.
Pickup at Factory Store
Free
Bring your order confirmation and a valid ID.
FedEx Freight (Economy)
Quoted
For large or heavy orders.
FedEx Freight (Priority)
Quoted
For large or heavy orders, faster transit.
Carriers
We ship with FedEx, UPS, and USPS, and we pick the carrier that gets your order to you reliably at the best cost. We cannot guarantee a specific carrier unless you arrange it with us ahead of time.
PO Boxes
Orders to PO Boxes often cost more and usually do not qualify for free shipping. Use a physical address to avoid delays and added fees.
Outside the Continental US
We ship to Alaska, Hawaii, Puerto Rico, Guam, the Northern Mariana Islands, and the US Virgin Islands. Free shipping generally does not apply to large or bulky items going to these destinations, though Hawaii and Alaska have more flexibility depending on carrier policy. Rates are quoted at checkout or on request.
Canada
We ship select items to Canada. Canadian customers need to choose "UPS Standard Shipping to Canada" at checkout so your order clears customs cleanly and you avoid surprise brokerage fees. Orders placed with other methods can be delayed or rejected at the border.
Vendor-Fulfilled Items
Some products ship directly from our vendor partners and show their own estimated ship dates on the product page. Questions about these go to support@buildasoil.com.
Freight Shipments
Freight orders arrive on pallets by box truck or semi. We assume you need liftgate service unless you tell us otherwise.
Inspect every freight shipment before you sign. Count the packages and check for damage. Signing the delivery receipt confirms the order arrived complete and undamaged, so note any problem on the receipt before you sign it.
Full Truckloads
Full truckload (FTL) orders are custom quoted after checkout based on your location, order volume, and how the truck will be unloaded.
- Let us know if you have a dock, forklift, or other unloading equipment.
- Tell us if you need liftgate or manual unload service.
- Email support@buildasoil.com ahead of time for an FTL quote.
Order Tracking
We email tracking as soon as your order ships. If it does not arrive, check buildasoil.aftership.com with your order details, or email support@buildasoil.com.
Shipping Protection
This optional add-on at checkout covers your shipment against loss, theft, and damage, and we fast-track those claims for replacement or resolution. Even with protection, photos and documentation help us move carrier claims along faster.
Claims
Send all claims to support@buildasoil.com. We do not process claims by phone.
Include:
- A description of the issue
- Photos or video of the damage, or of missing or incorrect items
- Images of the packaging and labels
Hold onto the packaging and any damaged items until the claim is resolved, since carriers may require an inspection.
Claim deadlines
- Damage or missing items: within 60 days of delivery
- Incorrect products: within 60 days of shipment
- Lost or misdelivered packages: within 60 days of shipment
Once Your Order Leaves Our Facility
We help with every carrier claim we can. But once an order is in the carrier's hands, we cannot control delays, damage, or misdelivery, and the carrier makes the final call on claims.
PAR METER (PPFD): Lightray Diffuser & Cosine Corrector - 1 Unit is backordered and will ship as soon as it is back in stock.
Description
Description
You can’t dial in what you can’t measure.
Light is one of the biggest levers in your entire grow, and most growers are flying blind on it. You’re trusting the manufacturer’s PPFD chart, eyeballing your hang height, and hoping you’re in the right range for your stage. But those specs are measured in perfect lab conditions, not your tent. Being off on your light means leaving yield and quality on the table, or stressing your plants without ever knowing why.
The other option has always been a dedicated meter like an Apogee, which runs $500 to $600. For most home growers, that’s a hard pill to swallow just to check your light.
There’s a better way, and it’s already in your pocket.
The Lightray Diffuser clips onto your phone’s camera and, paired with a free app, turns it into a genuinely accurate PPFD and DLI meter. We use it at BuildASoil right alongside our $500-plus Apogee device, and we find it comparable. That’s not a gimmick, it’s professional-grade light measurement for a fraction of the cost.
Now you can walk your canopy, see your real PPFD at every spot, set your hang height with confidence, and actually hit the targets in our Environmental Protocol instead of guessing.
How it works
The diffuser is a precision semi-transparent disc with a microscopically rough surface that scatters incoming light evenly. That even diffusion, combined with proper cosine correction (the directional accuracy that matters in real-world lighting), is what lets your phone read light accurately from any angle. It’s developed and tested in a Swiss optics lab, and each one is hand-assembled and quality-checked. You clip it over your camera, open the app, and read your light. That’s it.
What to know before you buy
The diffuser works with the free Photone or LM-3000 app. The app is free to download and use. To measure your specific light source accurately, you unlock that light type for a one-time cost of about $3 to $7 (valid for life). We use and recommend the Full Spec LED option. Optional Pro features (all light sources, color temperature, advanced settings) are available as a subscription if you want them, but you’re never charged anything without explicitly choosing to buy.
It works with iPhone and iPad, and with many Android devices as well, though not every model is supported. Please check your device on the full list before ordering: see the compatibility list.
See it in action
We walk through measuring PPFD, DLI, and VPD to dial in your grow tent in this tutorial: How To Set Up Your Grow Tent Environment // DLI, VPD & More (Season 6, Episode 03).
Why growers choose it
- Accuracy that rivals expensive hardware meters, at a fraction of the price
- Proper cosine correction for true, real-world readings
- Swiss-engineered and lab-tested, hand-assembled and quality-checked
- Clips on in seconds, professional measurement that fits in your pocket
- Ships within one business day, with worldwide delivery
Free shipping is included when you purchase two or more “free shipping available” items.
Stop guessing at your light. Measure it, dial it in, and grow with confidence.
Specifications
Specifications
-
Length (in)
-
Width (in)
-
Height (in)
Questions?
We are here to help and our entire staff knows how to grow. Just reach out via chat, email or even phone. We are passionate about growing and want you to succeed.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Based on 60 reviews
98%
of reviewers would recommend this product to a friend
Customer photos and videos
60 Reviews
Reviewed by Daniel S., from United States
Verified Buyer
I recommend this product
Experience With Organics
0-1 Years
par meter
excellent
Loading...
| Quality |
Rated 5 out of 5
|
|---|---|
| Value |
Rated 5 out of 5
|
| Shopping Experience |
Rated 5 out of 5
|
Was this helpful?
Reviewed by Tim J., from United States
Verified Buyer
I recommend this product
Experience With Organics
10 Years Plus
Great Product
Get the app and go. This is so nice. No more guess work. It's fast and easy. Fantastic
Loading...
| Quality |
Rated 5 out of 5
|
|---|---|
| Value |
Rated 5 out of 5
|
| Shopping Experience |
Rated 5 out of 5
|
Was this helpful?
Reviewed by Arlie K., from United States
Verified Buyer
I recommend this product
Experience With Organics
1-4 Years
diffuser
nice simple device that makes it much easier to make correct decisions regarding my plant lighting.
Loading...
| Quality |
Rated 5 out of 5
|
|---|---|
| Value |
Rated 5 out of 5
|
| Shopping Experience |
Rated 5 out of 5
|
Was this helpful?
Reviewed by Ross L., from United States
Verified Buyer
I recommend this product
Experience With Organics
7-10 Years
Diffuser
I had no idea how bad I was treating my plants. Now I can count on my phone to give me accurate PAR readings. I was way over PAR recommendations. Thanks to Photone and this diffuser I have the correct readings.
Loading...
| Quality |
Rated 5 out of 5
|
|---|---|
| Value |
Rated 5 out of 5
|
| Shopping Experience |
Rated 5 out of 5
|
Was this helpful?
Rated 4.9 out of 5
