Last Updated 58 minutes ago
Overview
The Type 7291 puts six 1 kW tungsten lamps over a 36¼-inch silk target. With the black skirt fitted, one head delivers 28 fc at 15 ft and its field is 21 ft wide. The six circuits give the board operator a way to step down output while keeping the active globes at full voltage.
Key specifications
| Specification | Type 7291 |
|---|---|
| Full lamp load | 6 × 1,000 W with FCM lamps |
| Rated supply | 120/240 V AC or DC, with lamps matched to the supply |
| Combined current | 50 A with a full set of 120 V FCMs |
| Circuit arrangement | Six 1 kW circuits on a panel-mounted male Socapex |
| Head diameter | 27¾ in. |
| Weight | 16 lb bare head, 34 lb with black skirt, silk and target |
| Mounting and reflector | Attached chain hanger, Alzak aluminium reflector |
Replacement lamps
The head takes double-ended T-3 quartz lamps with recessed single contacts and a 4 11/16-inch overall length. Mole specifies horizontal operation within 4°. The ratings below are per lamp. Look up the FCM lamp code.
| Lamp | Power | Voltage | Rated colour | Finish | Rated life |
|---|---|---|---|---|---|
| FCM | 1,000 W | 120 V | 3,200 K | Clear | 300 h |
| FHM | 1,000 W | 120 V | 3,200 K | Frosted | 300 h |
| EME | 800 W | 240 V | 3,200 K | Clear | 250 h |
| EMF | 800 W | 240 V | 3,200 K | Frosted | 250 h |
| EMD | 750 W | 120 V | 3,200 K | Frosted | 400 h |
| EJG | 750 W | 120 V | 3,200 K | Clear | 400 h |
| FDF | 500 W | 120 V | 3,200 K | Clear | 400 h |
| FDN | 500 W | 120 V | 3,200 K | Frosted | 400 h |
| FCL | 500 W | 120 V | 3,000 K | Clear | 2,600 h |
| EHM | 300 W | 120 V | 2,950 K | Clear | 2,000 h |
| EHZ | 300 W | 120 V | 2,950 K | Frosted | 2,000 h |
Strengths and limitations
- The full skirt keeps much of the spill off nearby walls. With the outer skirt removed, the glowing white cylinder can act as a broad source for both the subject and background.
- The full black skirt hangs 43 inches below its attachment. Allow for the fabric as well as the head when planning a low ceiling or a wide shot.
Practical uses
Over a standing set, the black skirt can keep the tops of the walls dark while the bottom target lights the action. For a broader wash, expose the silk cylinder. When laying out a grid, the 27 ft field at a 20 ft throw marks roughly half the centre intensity at its edge. Check the overlap where the actors travel.
Output and photometrics
Mole tested the head with 1,000 W, 120 V FCM globes rated at 3,200 K. The lux figures are converted from the published foot-candles and rounded.
Black skirt, white silk and bottom target
Throw is measured down from the fixture. Field width is the diameter at about half the centre intensity.
| Throw below head | Centre (fc) | Centre (lx) | Field diameter |
|---|---|---|---|
| 10 ft | 65 | 700 | 14 ft |
| 15 ft | 28 | 301 | 21 ft |
| 20 ft | 16 | 172 | 27 ft |
| 25 ft | 10 | 108 | 35 ft |
| 30 ft | 7 | 75 | 41 ft |
White silk and bottom target, outer black skirt removed
Mole labels its open-silk diagram by diameter. Choose the diameter marked on the diagram when looking up an intensity. The skirted table uses vertical throw below the head.
| Chart diameter | Illuminance (fc) | Illuminance (lx) |
|---|---|---|
| 10 ft | 65 | 700 |
| 15 ft | 28 | 301 |
| 20 ft | 16 | 172 |
| 25 ft | 10 | 108 |
| 30 ft | 7 | 75 |
Exposure at a measured setup
Select a measured position. Set the ISO, frame rate and shutter angle to estimate the incident-meter aperture.
Chart reading and exposure
Select a configuration to calculate.
The chart uses 1,000 W FCM lamps at 120 V. Different fabrics, lamps and dimmer levels change the output. Mole-Richardson photometric sheet.
Power and controls
Six independently accessible 1 kW circuits feed the head through its Socapex connector. At 120 V, six FCMs draw about 8.3 A each and 50 A in total. Mole lists adapters that group circuits, so the cable package determines how many groups reach the dimmer.
Skirts, target and mounting
The white skirt diffuses the light around the sides. The target stretches across the bottom. The outer black skirt cuts the side light while leaving the bottom opening. Mole specifies these parts for the Type 7291.
| Accessory | Mole part | Dimensions |
|---|---|---|
| Full black skirt | 729-35 | 38½ in. diameter × 43 in. long |
| White silk skirt | 729-36 | 33½ in. diameter × 36 in. long |
| Silk target | 729-37 | 36¼ in. diameter |
Comparable fixture
At a 20 ft throw with the full black skirt, the 12 kW model gives 36 fc and this 6 kW gives 16 fc. The larger head takes a 54¼-inch target. 12 kW Spacelite (Type 7281).
Field coverage
MPS lists the Type 7291 with six FCM lamps and quotes the same 28 fc at 15 ft as Mole. Red Star’s 6K rental description also specifies diffusion and a spill skirt. MPS Type 7291 listing. Red Star’s 6 kW package.
Spacelights on a music-video set
Adorama Rental points to the overhead rig in Kimbra’s “Cameo Lover” shoot as an example of several Spacelites working together. The behind-the-scenes footage shows the arrangement. The exact head sizes are unconfirmed. Adorama Rental’s breakdown.
Rental and used-fixture checks
Confirm how the rental breakout groups the six circuits, and label the console channels accordingly. Test the lamp banks against the actual silk before choosing which banks to switch out.
Documentation
- Mole-Richardson model and accessory specifications
- Type 7291 lamp table and photometric diagrams (PDF)
- Mole-Richardson catalogue, Spacelite family (PDF)
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