The Sylvania HMI4000WDXS HMI Metal Halide Lamp is a clear 4000W, 200V, R36X65/700 double-ended base bulb. It outputs up to 380,000 lumens with a color temperature of 6000K and has a rated lifespan of 500 hours.

380,000 Lumens    Double-Ended eXtreme Seal Technology    Dimmable Down to 40%    Metal Halide, Double-Ended    High Intensity Light with a CRI>90    Used In Film, TV & Video Production    Averahe Rated Life of 500 Hours    Hot Restart

High intensity light providing true color performance with a CRI>90

Longer life with heat dissipating round moly-foil design on lamps ≥ 6000W

Capable of hot restrike ignition

High color stability with average changes in color temperature during lamp life only 1°K/h

Dimmable down to 40% with stable color using many electronic ballasts

Compression sealed base provides enhanced durability

Areas of use include studio, TV, film, professional photography, and solar simulation

High energy efficiency providing up to 100 LPW

Mechanically robust with eXtreme Seal (XS) technology, up to 842°F at the pinch seal

Related Questions and Answers

Q: 1. If used on a Samsung 20-50mm lens, will the original lens cap still fit with the hood in place?

A: Yes, the front of the hood is also 40.5mm and will accept the original lens cap.

Q: 2. Will this vignette on a Sony FE 28-60mm f/4-5.6 ?

A: This hood would not vignette with the Sony FE 28-60mm f/4-5.6.

Q: 3. can this be mounted to the ceiling?

A: From what I can tell, this is designed to be mounted to both the wall and ceiling. The hooks on are shaped to hold the rolls either from the wall or ceiling, not just the wall (as other answers would have you believe). The Varidrives that hold the rolls are also designed so that they can support something hanging from the wall or the ceiling. Like a previous answer said, you should mount into a wood beam when securing into the ceiling.

Q: 4. Will this work on the 17mm ttartisan lens for aps-c sensor and not induce vignetting?

A: It should be fine and not vignette using it on a 17mm lens on an APS-C camera.

Q: 5. ok for 40mm lens?

A: Great for more telephoto lenses, but for wider angle lenses like a 40mm lens, you may see some vignetting with a hood like this.

Q: 6. Does the sliding plate have both 1/4 and 3/8 screw together?

A: No, there are not screwed together, but you have the option of both. The plate is drilled for both options and also includes the screws. I hope it helps your question.

Q: 7. Is there a way to attach a Peak Design anchor to this plate?

A: No there is no option to attach a strap hook

Q: 8. Are the rails on the bottom of this grip Arca Swiss compatible?

A: Yes. It fits the grips perfectly on my Arca Swiss Monoball tripod head.

Q: 9. Can I mount this on the ceiling?

A: You can mount this on a ceiling.

Q: 10. Will this vignette on a 50mm lens?

A: You would be better off using the short version of this hood, Heliopan 40.5mm Short Metal Lens Hood, BH # HELHMS40.5 to prevent vignetting on a 50mm lens mounted on a full frame sensor camera.