Hemp Bioplastic Frame
Carl Zeiss Lenses
Published Transmittance Data
Free US Shipping over $75
RazorGrow
Cerulean ZEISS Growlight
$89.00
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RazorGrow
$89.00
Free US Shipping
On orders over $75
Easy Returns
30 days, unworn
Limited Warranty
One year on frames
Why Growers Buy These
- Carl Zeiss lenses engineered specifically for grow room environments
- Blue for high pressure sodium, brown for LED and close inspection
- Flash ML infrared coating absorbing across 780–2000 nm
- Published transmittance curves — measured, not asserted
- Hemp bioplastic frame, limited one-year warranty
Lens specification
Carl Zeiss grow-room lens, available in blue and brown.
- Blue — VLT 35.88%, filter category 2
- Brown — VLT 30.79%, filter category 2
- Flash ML infrared coating — absorbs across 780–2000 nm: strong absorption of near infrared (IR-A, 780–1400 nm), partial absorption of far infrared (IR-B, 1400–2000 nm)
Partial means partial. The transmittance charts are in the image gallery above — very few grow lenses at any price publish one. See The Grow Light Lens Guide for how to read them.
Which lens for my room
- Mostly HPS — blue. It reduces the yellow and orange wash sodium produces, so green reads as green again.
- Mostly LED — brown. Under LED the problem is flattened contrast rather than a color cast, and brown restores the surface detail that early stippling, bronzing and mildew show up in.
- Mixed light — brown. It handles both without leaving you blind to either.
- Metal halide, CMH, LEC — blue for general work, brown if your main task is close inspection.
Frame & fit
A contoured performance frame in injection-molded hemp bioplastic. The arms are corrugated and carry rubber ProGrip bands, so the glasses hold position when you are leaning into a canopy rather than sliding down your nose every time you look down.
- Frame: injection-molded hemp bioplastic, dark finish
- Shape: contoured wrap, ProGrip temple bands
- Fit: unisex adult
Frame measurements are being confirmed and will be published here.
The frame is a hemp composite. Hemp is grown as a crop rather than recovered as waste, which makes it a renewable agricultural input instead of salvage. That is the rest of what we do — it is not why you would buy these. You would buy these for the lens.
Limited warranty
Frames carry a limited one-year warranty against manufacturing defect, including breakage and delamination. A valid claim is resolved with a replacement pair, a repair, or store credit — your choice. Lenses, scratches, loss and normal wear are not covered. Full terms.
Shipping & returns
Free US shipping on orders over $75. International shipping at live carrier rates; duties and taxes are the customer's responsibility. Unworn returns accepted within 30 days. Questions about a specific setup: info@hemp3d.com.
Named Optics
Carl Zeiss lenses, engineered specifically for grow room environments. Frame makers rarely make lenses — ask any seller whose optics they are, and expect a name.
Published Data
Zeiss publishes transmittance against wavelength for these lenses, and the curves are on this page. If a seller will not show you a curve, nobody measured it.
See the Plant, Not the Light
Deficiencies, mites and mildew all announce themselves as color and contrast changes. Under uncorrected grow light most of them stay invisible until they are advanced.