What the Coup HPSx Transition Lens Does
The HPSx lens is a proprietary polycarbonate blend, made in the USA. Notch filtering takes the red and yellow peaks out of sodium light near 660 nm, so foliage reads close to true instead of orange. UVA, UVB and UVC are blocked outright. The lens also settles the strobe that HPS and metal halide ballasts throw across a room. What makes this one different is the photochromic layer. Direct sunlight shifts it from the blue grow tint to a soft grey, and it is fully dark in about three minutes.
Choosing HPS Transition Glasses for Inside and Out
This is the lens for a grower who checks a room and then walks straight outside. One pair covers both, rather than a pair on the bench and a pair in the truck. The frame is the Italian TR90 Coup, a wayfarer cut with concealed flex hinges and enough give to survive a pocket. A microfiber pouch comes with it. Two honest limits are worth knowing first. The photochromic layer needs direct sunlight, so indoors and behind glass it stays blue. That is what you want in the room, but it also means the lens will not darken in a truck cab. And the correction is cut for sodium. Under LED or metal halide it works against you. If you never leave the room, the Perfect Color mineral glass lens is the sharper tool for sodium.
Key Features
- Photochromic lens: Direct sunlight carries it from the blue grow tint to a soft grey.
- Fully dark in about three minutes: Fast enough that the walk to the truck is the whole transition.
- Notch filtering: Pulls the red and yellow peaks out of sodium light near 660 nm.
- Blocks UVA, UVB and UVC: Full ultraviolet block, indoors under lamps and outdoors in daylight.
- Settles the strobe: Takes the flicker that HPS and metal halide ballasts throw across a room.
- Lens made in the USA: A proprietary polycarbonate blend, not a tint laid over clear plastic.
- Italian TR90 Coup frame: Wayfarer cut with concealed flex hinges, and a microfiber pouch in the box.
- Indoors it holds the blue state: There is no direct sunlight in a room, so the tint stays where you need it.
- Cut for sodium, not LED: Under LED or metal halide the correction works against you, not for you.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Method Seven |
| Part Number | FGV020 |
| Model | Coup HPSx |
| Lens | HPSx, proprietary polycarbonate blend, made in USA |
| Lens Type | Photochromic, blue under HPS to soft grey in sunlight |
| Transition Time | About three minutes to full darkness in direct sun |
| Transition Trigger | Direct sunlight. Indoors the lens holds the blue state |
| Filtering | Notch filtering across the red and yellow peaks near 660 nm |
| UV Protection | Blocks UVA, UVB and UVC |
| Flicker | Removes the strobe from HPS and metal halide ballasts |
| Frame | Coup wayfarer, TR90 thermoplastic |
| Frame Origin | Designed in Southern California, made in Italy |
| Hinges | Concealed flex hinges |
| Included | Microfiber pouch |
| Intended Lighting | High pressure sodium, plus daylight outdoors |
| Not For | LED or metal halide rooms |
| Indoor Only Option | Perfect Color HPS mineral glass lens |
| Warranty | No cost repair or replacement for manufacturer defects |