Last Updated 2 hours ago
Overview
The Type 2791 stacks four Molefar cells in a two-by-two housing. Its four independent circuits accept up to 1,500 W each, for a 6 kW head. The stacked layout fits four gel colours into less pipe width than the three-cell horizontal strip.
Key specifications
| Specification | Type 2791 |
|---|---|
| Maximum head load | 6,000 W across 4 circuits |
| Maximum per cell | 1,500 W, 12.5 A with a 120 V lamp |
| Control | Separate lead per cell. External switching or dimming. |
| Width and depth | 37¾ in. wide × 9¾ in. deep |
| Globe sockets | Recessed single-contact lamp, with one spring contact at each end |
| Filter hardware | Two Type 27912 two-cell holders, 4 individual Type 27934 filter frames |
Mole’s photo caption and rental catalogue identify the four-light head as Type 2791. The series specification table labels its four-light row “2661”, a number the rental catalogue assigns to a different two-light cyc. The separate 2791 listing confirms the four lamps, 6 kW total, width and depth. Verify the hanging drop and weight on the actual unit. Type 2791 product listing.
Replacement lamps
Mole lists three 120 V, 3,200 K double-ended lamps. Each end of the globe seats in a spring-loaded contact. The series sheet specifies horizontal lamp operation within ±4°.
| Lamp code | Power | Current at 120 V | Ushio finish | Ushio rated life |
|---|---|---|---|---|
| FDB | 1,500 W | 12.5 A | Clear | 400 h |
| FGT | 1,500 W | 12.5 A | Frosted | 400 h |
| FFT | 1,000 W | 8.3 A | Clear | 300 h |
The original Mole sheet lists a clear FGT and a 500-hour FFT. The finish and life above are for Ushio’s own catalogued lamps. Match the markings on the replacement. Ushio double-ended quartz lamp catalogue.
Strengths and limitations
- Four independently controlled colours share one hanging position. Two stacked rows keep the fixture compact from side to side.
- The second row takes up vertical space. Check clearance below the pipe with the actual holders and hanging hardware fitted.
Practical uses
For a four-colour cyc, record the colour and circuit number for each position in the square. Bring up a single colour across the full run before blending cues. One head patched in a different order can leave a patch of the wrong colour midway across the backing.
Output and photometrics
The series sheet identifies the Type 2701 one-light and an FDB lamp in its photometric test. It gives no four-cell output figure for the Type 2791. For the four-light array, Mole suggests about 6 ft between heads along the pipe as a starting point, adjusted for cyc height. That spacing is separate from the setback. Meter the top, middle and bottom for each active colour.
Molefar series mounting diagrams and test conditions.
Power and controls
Four individually fed cells take 1,000 W or 1,500 W lamps. Four 1,500 W lamps at 120 V draw 12.5 A on each feed, or 50 A summed across the four circuits. Four 1,000 W lamps give a 4 kW total.
Mole specified three 36 in. conductors per circuit, with the plug selected when ordered. Confirm the fitted connectors and lamp voltage at prep. The lamp table above covers 120 V globes.
Optics and mounting
Two Type 27912 holders each cover a pair of lamps. Four individual Type 27934 frames take the gels. The product photograph shows one holder above the other on the square head.
Comparable fixture
The three-light Type 2841 carries its cells in one horizontal row and has a documented pipe-to-frame drop of 22¼ in. Compare the Molefar layouts in the manufacturer’s catalogue.
Field coverage and further reading
B&H identifies the four-light as 2791-4C and describes a square head with four separate feeds. Mole’s rental catalogue also lists the four-circuit unit under Type 2791. B&H archived Type 2791-4C listing.
Rental and used-fixture checks
Confirm the Type 2791 nameplate, all four feeds, both holders and four frames. Obtain the configured weight and pipe-to-frame drop from the supplier before specifying the hang.
Documentation
- Mole-Richardson Molefar Super Quartz Cyc-Strips, specifications and mounting diagrams (view the original sheet online)
- Type 2791 specifications on AV-iQ
- Mole-Richardson rental catalogue, Molefars
- Ushio double-ended quartz lamps
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