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Description
double ended grow light bulbs Growers Choice 1,000 Watt Double-Ended CMH Bulb, 4,200K – VinehydroponicsGrowers Choice 1,000 Watt Double Ended CMH Bulb, 4K CMH Descriotion Introducing the worlds first 1,000W Ceramic Metal Halide lamp. As a direct replacement for your existing 1,000 watt HID fixtures, this 1,000W CMH lamp provides the absolute highest photosynthetically active radiation (PAR) to your specialty flowering plants. Emitting an astonishing PPFD and with an extremely high CRI this lamp will not only increase your overall dry weight but will
Growers Choice 1,000 Watt Double-Ended CMH Bulb, 4K -CMH
Descriotion
Introducing the world’s first 1,000W Ceramic Metal Halide lamp. As a direct replacement for your existing 1,000 watt HID fixtures, this 1,000W CMH lamp provides the absolute highest photosynthetically active radiation (PAR) to your specialty flowering plants. Emitting an astonishing PPFD and with an extremely high CRI this lamp will not only increase your overall dry weight but will also raise the quality of your harvest. Grower’s Choice has continuously produced the world’s most accurate spectrum, closely replicating the sheer power of the sun. By using existing double-ended fixtures with our new 1,000 watt CMH lamp you can completely overhaul the lighting in your facility, and enjoy watching your yields increase as your temperatures decrease.
Features:
- Upgrades your standard DE fixture to an CMH/LEC fixture to instantly increase yield per watt
- Produces more PAR per watt than standard Metal Halide
- Richest spectrum on the market
- CRI of 98 makes this lamp the closest solution to sunlight available
- Promotes extremely tight internodal spacing, leading to more flowering sites and a fuller canopy
- Offers significant improvement in spectral quality over standard Metal Halide
Performance Data:
- Light output (Lumens @ 100 Hours): 110,000
- Lumens per Watt (lm/w): 110
- Rated life (Hours @ 10 Hour / start): 10,000
- Correlated Color Temperature (K): 4,200
- Color Rendering Index (CRI) or (Ra): ≥98
- Photon flux (μmol/s): 1930
- Burning Position: HOR±15°
Specifications:
| Brand | Growers Choice |
|---|---|
| SKU | GC1000W4KCMH |
| Weight (lb.) | 0.31 |
| Prop 65 | No |
| Warranty | 1 Year |
| UPC | |
| Lead Time | This product ships in 1-3 Business Days |
| UL Listed | No |
| Lighting Type | CMH - Double Ended |
| Bulb Orientation | Horizontal |
| Bulb Type | Double Ended Ceramic Metal Halide |
| Color Temp (Kelvin) | 4200 K |
| Color Rendering Index (CRI) | ≥98 |
| Bulb Lumens | 110,000 |
| Estimated Life Hours | 10,000 |
| Exact Watts | 1000 Watts |
| Amps | 4.7A |
| Voltage | 220 Volts |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 1
Frame too short
Color: Beige, Size: 132in-Large Metal Base
Can’t be assemble due to the frame being too short
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Reviewed in the United States on May 20, 2026
★★★★★ 5
great room divider
This room divider is very nice, good fabric, blocks light, not entirely bit alot for my needs. covers or blocks
what i dont want others to see, the assembly was some difficulty but he end product is fantastic.. i recommend fully.. thank you for a great product
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Reviewed in the United States on December 25, 2024
★★★★★ 4
Offers Complete Privacy
Color: Black, Size: 132in-Large Metal Base
We tried others that were nice but this particular room divider adds total privacy. We were looking for that. Easy to assemble. There is no gap if you position each petition close enough. The guality is very nice. Exactly what we were looking for.
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Reviewed in the United States on June 24, 2025
★★★★★ 5
Versatile Room Divider With Easy Assembly and Strong Coverage
Size: 3 Panel 12FT W
I picked up this Siebwin 3-panel folding room divider mainly for privacy and room separation, and overall it works very well.
Assembly is very straightforward, and the divider can be set up, taken apart, and stored without much effort. The fabric quality feels good, and the frame construction is stronger and more stable than expected. The support tubes especially feel well built and help keep the divider standing securely.
One feature I really liked is the flexibility of the design. The panels can be used together as a complete divider or separated depending on the setup and available space. That makes it much more versatile for different room layouts or temporary privacy needs.
The coverage is also very good, and the size matches the manufacturer’s description accurately. The fabric blocks light and background visibility well enough to provide solid privacy without feeling overly heavy. The wider feet also help improve stability compared to thinner folding dividers.
Another positive detail is that everything arrived complete with no missing parts or damaged pieces, which made assembly much easier and faster.
Compared to cheaper privacy screens, this one feels more durable and easier to customize depending on the situation. In terms of value for the money, it feels like a very practical and worthwhile purchase considering the size, flexibility, and build quality.
Overall, a versatile and well-built room divider with easy assembly, strong privacy coverage, stable construction, complete included parts, flexible panel configuration, and excellent everyday functionality.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one.
The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy.
Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex.
The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one.
The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
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Reviewed in the United States on May 25, 2026