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June discounts on LED grow lights and more! | VIEW DEALS
June discounts on LED grow lights and more! | VIEW DEALS

Mammoth Lighting PAR Meter and Spectrometer | 380nm-780nm, UV - IR | PRE-ORDER: Shipping end of June

Original price $499.00
Original price $499.00 - Original price $499.00
Original price $499.00
Current price $449.00
$449.00 - $479.00
Current price $449.00

Pre-order only

This item is on pre-order and will ship as soon as it is in stock.

  • Free shipping in the USA (lower 48 states)
  • Ships discreetly
Bulk / Commercial Discounts and HUGE Rebates

Email us or call 888-611-9305 TODAY! Rebate inquiries here.

Interest-Free Financing Options

Checkout and pay with Sezzle, Shop Pay Installments or PayPal Pay In 4.

Full Manufacturer's Warranty

Don't stress! ALL of our products come with a full manufacturer's warranty.

Introducing the cutting-edge PAR Meter and Spectrometer from Mammoth Lighting, a technological marvel crafted for precision and performance. Engineered with a high-speed CPU processor and a high-precision electronic CCD optical sensor, this device operates on the principle of a long focal cross-asymmetric CT spectroscopy system, delivering unparalleled accuracy and stability.

Enjoy the savings vs other brands at $500+ for just PAR readings!

Software program to download data

Key Features

1. Advanced Optical Technology:

  • Optical resolution of 2nm for precise measurements.
  • A wider wavelength range ensures comprehensive analysis.
  • Stable performance under various conditions.

2. Electronic Shutter Technology:

  • Minimum integration time as low as 50us, allowing measurement of strong and weak optical signals.
  • Adjustable integration time for versatility in signal detection.

3. Sleek and Portable Design:

  • All-aluminum alloy precision carving for a lightweight and portable body.
  • Modern design, completely discarding the bulk of traditional models.

4. Open Operating System:

  • Upgraded system with a more open operating system and source code.
  • Facilitates intelligent product applications and provides space for unlimited instrument upgrades.

5. Intuitive User Interface:

  • 3.5-inch high-definition IPS capacitive touch screen for a vibrant display.
  • High resolution for more content on a single screen, realistic graphics, and a smoother user experience.
  • Thoughtful interface design enhances usability.

6. Quick and Convenient:

  • Quick on/off functionality for swift operations.
  • One-click testing for seamless measurements.
  • Large battery capacity allows for 24 hours of extended testing time.

Whether you're a professional researcher, scientist, or enthusiast, this PAR Meter and Spectrometer redefines the standards of accuracy, convenience, and portability.

Elevate your experiments and measurements with a device designed for the future of scientific exploration.



Measures Photosynthetic Photon Flux Density for optimal plant growth.

Spectral Distribution Map:
Provides a detailed map of the spectral distribution for comprehensive analysis.

Related Color Temperature Tc (K):
Offers color temperature information for accurate lighting assessment.

Illuminance E (lx):
Measures the level of illuminance in lux for well-lit environments.

Irradiance Ee (W/m²):
Determines irradiance for a complete understanding of light intensity.

Chromaticity Coordinates (x, y):
Presents chromaticity coordinates for precise color representation.

Relative Spectral Power Distribution P(λ):
Illustrates the relative distribution of spectral power.

Color Rendering Index Ra, Ri (i=1-15):
Evaluates color rendering accuracy across a spectrum of indices.

Color Rendering Index:
Measures the device's ability to reproduce colors accurately.

Chromaticity Coordinate Map:
Displays a map of chromaticity coordinates for comprehensive analysis.

Color Tolerance Map SDCM:
Illustrates color tolerance using Standard Deviation of Color Matching.

Main Wavelength, Peak Wavelength, Half Width:
Provides crucial information about the light spectrum.

Light to Dark Visual Ratio S/P:
Evaluates the visual experience by assessing light-to-dark ratios.

Color Purity, Red Ratio, Green Ratio, Blue Ratio:
Analyzes color components to ensure accurate representation.

Can Export Spectral Data per Nanometer:
Allows for detailed spectral data export for in-depth analysis.

More Functional Parameters Can Be Customized:
Tailor the device to specific requirements with customizable parameters.


Main Technical Indicators

Model and Name:
M400 Spectral Color Illuminometer

Wavelength Range:
380nm~780nm for comprehensive spectral coverage

Split Mode:
Long focal cross asymmetric CT split beam system

High-precision CCD for accurate light sensing

Spectral Bandwidth (FWHM):
2nm for detailed spectral analysis

Spectral Resolution:
0.2nm for high-resolution data

x, Y Coordinate Value x, y Accuracy:
±0.0015 accuracy; ±0.0005 repeatability

Wavelength Accuracy:
±0.5nm for precise wavelength measurements

Wavelength Data Output Interval:
1nm; EXCEL can export data corresponding to each nanometer

Illumination Accuracy Level:
Level 1 (±4% reading ±1 reading) for reliable results

Color Rendering Accuracy:
±1.5% for accurate color representation

Photosensitive Surface:
Ф 10mm for efficient light capture

Screen Type:
3.5-inch high-definition IPS capacitive touch screen for intuitive operation

Chromaticity Standard Accuracy:
±0.0025, traceable to NIM for reliable color temperature assessments

Color Temperature Range:
1000K~100000K for versatile lighting conditions

Stray Light:
≤0.3% to minimize interference

Illuminance Measurement Range:
0.1Lux~2000Klux for diverse lighting environments

Measurement Mode:
Single test/continuous test for flexibility in testing scenarios

Order Confirmation

As soon as you place the order, an order confirmation will be emailed to you. This means we have received your order and payment. Payment is captured as soon as the order is placed. In rare cases, if the product is on backorder or unavailable, we will contact you and ask if you would like to wait for the product to become available, switch your product, or have your payment refunded. If the item is available for shipment we will submit the order for processing and arrange shipment. Please see current estimated lead times on the product page for each product. 

***We cannot change the shipping address after the order is placed.***

Order Shipment

Most products ship within 2 to 3 business days from the date of your order (unless indicated on the product page). Some items take a bit longer to ship since they are built to order (i.e. ChilLED Tech, Trimmers, etc). We will send you tracking information as soon as it is available. If a week has gone by and you do not have tracking information yet, please reach out to us.

U.S. Shipping

We are based in Portland, Oregon with warehouses nationwide. We offer FREE shipping in the lower 48 states (sometimes to HI and AK, too) via FedEx, UPS, USPS or other major couriers (product/brand dependent). Expedited shipping is usually available for an extra cost. Contact us before your purchase if you prefer an expedited shipping method and we will get you a quote.

After the order is processed, allow 2 to 7 business days for the product(s) to reach you if shipped to a U.S. address. We can ship to PO boxes in some cases. We recommend using a street/residential address instead.

International Orders

Nearly all of our brands can be shipped internationally using FedEx, UPS, USPS, DHL or other couriers. Most quotes can be obtained at checkout. If not, please email us to receive a shipping quote for lights shipped outside of the USA. You may also place an order on our online store for items that require a quote and we will notify you via email on the exact shipping costs. 

Some items/brands can be shipped for free.

Items shipped internationally from the USA may have VAT, duties, taxes, and/or local charges due at delivery. These charges are the responsibility of the customer and not LED Grow Lights Depot.


If you need to cancel your order, we recommend reaching out to us ASAP. We charge a 2.9% (credit card), 3.5% (PayPal), 4.0% (PayPal International), 4.1% (American Express), or 6.5% (Shop Pay Installments or Sezzle) order cancellation fee after the order was received. We can accommodate most requests, but due to the different time zones and schedules that our warehouses ship from, sometimes the cancellation request may not reach the warehouse in time before the product ships. Once the item has been arranged to ship or has shipped, the package will be treated like a 'return' and is subject to ship-back fees and restocking fees. If you purchased 'Route Package Protection', this can not be refunded after the order has shipped. 

All EZTrim orders are final and non-refundable or returnable.


See our full Return Policy for rules and guidance on returning an item after purchase and for brand-specific return dates. A 5-25% restocking fee (brand dependent) may apply for returns within the dates of the return policy. Reach out to us for exact return instructions and restocking fees for the item(s) that you purchased since these vary by brand. 'Route Package Protection' cannot be refunded if an item is returned en route or after you receive it.

If you have any questions or would like to check the availability of an item, you may email us here or call us at (888) 611-9305. Thank you for shopping with us.

We now offer Route package protection to help cover the cost of lost, damaged, or stolen packages.

What is Route Protect?

Adding Route Package Protection to your order at checkout means that your order is protected against being lost, damaged, or stolen. In the unfortunate instance that you experience one of these inconveniences, you can report an issue with Route and they will work with you to make sure you get the resolution you prefer. 

Purchased Route Protect and need to file a shipping issue? File here 

General shipping, tracking, and issues questions

Route Refunds vs Reorders

Refunds: When refunding an item, Route covers the subtotal of the order. Shipping costs, taxes, and the Route premium are not included.

Reorders: Route will reorder the items, but please note that items can only be replaced depending on in-stock availability. All reorders have Route Shipping Protection added, for free! 

What are Route’s Policies?

All policies are listed here 

Marked As Delivered (Stolen)

Issues can be approved no earlier than 5 and no later than 15 days from when it was marked delivered Orders over $100 USD require a police report

Stuck In Transit (Lost)

Issues can be approved no earlier than 7 days and no later than 30 days from the last update (US), 60 days from order dateIssues can be approved no earlier than 20 days and no later than 30 days from the last update (International), 60 days from order date


File issues for damaged items with photos of the package and item (required) and no later than 15 days from when it was marked delivered.

What if my order never arrives or is stolen?

To protect your order against loss or theft, add Route package protection at checkout. 

When you add Route Protect, you can easily file an issue for a lost, stolen, or damaged package. When you file an issue, it will be reviewed for approval for a reorder or refund within 1-2 business days. 

What if my order is damaged?

To protect your order against damage that occurred during shipping, add Route Protect (package protection) at checkout. 

When you add Route Protect at checkout, you can easily file an issue for a lost, stolen, or damaged package. When you file an issue, it will be reviewed for approval for a reorder or refund within 1-2 business days. 

If your order has defects or you suspect it was damaged during manufacturing, please reach out to us here and we will be happy to work with you to remedy the situation. 

How do I file a shipping issue for my lost, stolen or damaged order?

If you insured your order with Route Protect at checkout, you will receive a confirmation email from Route with a link to file a shipping issue. 

You can also file a shipping issue on Route’s app or via the web here

Haven’t downloaded the app yet? Download here

Does Route Protect cover stolen items?

Yes! When you insure your orders with Route Protect, stolen items are eligible for reorders or refunds.

What if I need to cancel or return my order?

LED Grow Lights Depot can only reimburse you for Route package protection if the order has not shipped yet. If an order is cancelled en route or if you want to return your order, we cannot refund you for the Route package protection. No partial refunds for Route will be granted.

What are Route’s terms and conditions? 

Route’s terms and conditions are listed here:

Is Route a licensed insurance company?

Yes. Route is a licensed insurance company with SEG Insurance Ltd. as its partner.

1) Thousands of Successfully Shipped Orders and Thrilled Customers

We have been in business since 2014 and are a highly-trusted online retailer offering honest grow advice and top-of-the-line LED grow lights and other grow/harvest/extraction equipment. We have thousands of 5-STAR PRODUCT REVIEWS from satisfied customers.


2) Small, Family-Run, Veteran-Owned Business

Founder/Owner Erik H. overseas that every customer is 100% satisfied with their purchase. If something is wrong, we will make it right, guaranteed! Call, email, or message us anytime and we will get back to you in about 1 business day or less (typically with-in minutes or hours during normal business hours). We have your back!


3) Free Discreet Shipping in the USA 

We offer FREE shipping in the lower 48 states via FedEx, UPS, USPS, or other popular couriers. We can ship most other products to Hawaii and Alaska for free too.


4) Reliable International Shipping Available

Nearly all of our brands can be shipped internationally using FedEx, UPS, USPS, DHL or similar couriers. Go through the checkout process to receive a shipping quote or contact us if a shipping quote is not available at checkout. 

Items shipped internationally from the US may have VAT, duties, taxes, and/or local charges due at delivery. 


5) No Sales Tax in Some States

Forget shopping locally or on other popular retail websites that charge tax. You can save a lot of money when buying though us since we do not charge tax in some states.


6) 100% Low Price Guarantee

We strive to ensure that we offer the absolute best prices online. Rest assured that you are receiving the best online price when you shop with us.

If you find a better price online before or after you order from us (for up to one week), we will match or beat the competitor's price.

Although rare, we may refuse to offer a price match in which we incur a loss.


7) Easy Interest-Free Financing

Finance your purchase in minutes! See our available financing options below:

ShopPay Installments: 'Buy now, pay later’ with Shop Pay Installments. Have the flexibility to split your purchases into 4 interest-free payments over 6 weeks or monthly installments up to 12 months at 10-36% APR. Select Shop Pay Installments at checkout.

Sezzle: Buy what you want today and pay for it over four installments, interest-free. Look for the Sezzle button at checkout. Get approved up to $2,500. LEARN MORE.

PayPay Credit: No Payments + No Interest if paid in full in 6 months on purchases of $99 or more. Get approved in seconds! Select PayPal at checkout and pay with PayPal credit or APPLY HERE


8) Route Package Protection

Adding Route Package Protection to your order at checkout means that your order is protected against being lost, damaged, or stolen. In the unfortunate instance that you experience one of these inconveniences, you can report an issue with Route and they will work with you to make sure you get the resolution you prefer. LEARN MORE.


9) We are Authorized Dealers offering a Manufacturer's Warranty

You will buy confidently from us since only sell new, official products (no used items or clones). All warranties are new are 100% honored through the respective manufacturer.


10) Safe, Secure, Discrete Transactions

We accept major credit cards and debit cards, PayPal, Google Pay, Apple Pay, Sezzle, ShopPay, bank transfers, and money orders. All card payments are processed through our encrypted SSL security processing system. Your identity is always protected.


11) Hassle-Free Returns

And just in case your purchase was not up to your standards, we offer return shipping if you are not 100% satisfied for any reason. See our FULL RETURN POLICY for full details.

Happy grows!

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