Philips 7787LL (EVD 3H) - Bi-pin halogen lamp 400 W / 36 V G6.35 long life (300 h)
The Philips 7787LL (ANSI EVD 3H , LIF A1/239 ) is a low-voltage , reflectorless halogen capsule for projection, studio, and entertainment applications . It maintains a stable beam with high color accuracy thanks to its distortion-free quartz bulb and precisely positioned flat filament . It offers 400W at 36V , a color temperature of 3350K , a CRI of 100 , and a nominal luminous flux of 12,200 lm , with an average lifespan of 300 hours , reducing downtime and replacements compared to shorter-life variants. The G6.35 base facilitates easy replacement, and its S90 operating position (base down to horizontal) expands compatibility with numerous projectors and effects equipment.
Main features
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Long duration (300 h): Long Life version that reduces maintenance costs.
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High fidelity light: CRI 100 and 3350 K for natural color on scene and camera.
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Consistent output: 12,200 lm with virtually constant lumen maintenance throughout its lifespan.
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Precise construction: 9.4 × 4.7 mm flat filament and UV-open quartz bulb for a clean beam.
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Flexible operation: S90 position (base down ↔ horizontal) suitable for multiple optics and equipment.
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Standard interface: G6.35 socket (sometimes referred to as GY6.35 in trade listings).
Benefits for the installer and rental company
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Fewer lamp changes: 300 h nominal vs. 50–100 h options.
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Stable and homogeneous color: continuous halogen spectrum (CRI 100).
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Easy integration: Universal 36V bi-pin format for standard projectors and effects.
Typical use cases
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Projection and lighting effects in theaters, auditoriums, clubs and events.
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Technical applications (instrumentation/microscopy) that require CRI 100 and point focus.
Frequently Asked Questions
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How does it differ from the 7787XHP (EVD 100 h)? The 7787LL prioritizes lifespan (≈300 h, 12,200 lm , 3350 K ); the 7787XHP prioritizes output (≈50–100 h, ≈16,000 lm , 3400 K ). The remaining dimensions and G6.35 interface are equivalent.
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Is it dimmable? Yes; like all halogen bulbs, it can be dimmed. Keep in mind that dimming lowers the CCT rating and may affect color rendering.
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G6.35 or GY6.35? The official technical reference is G6.35 ; some distributors list GY6.35 as a compatible trade name.
Project description
Philips 7787LL bi-pin halogen lamp (ANSI EVD 3H , LIF A1/239 ), 400 W , 36 V , G6.35 base; 3350K , CRI 100 , 12,200 lm ; position S90 ; UV-open quartz bulb; flat filament 9.4 × 4.7 mm ; life 300 hours .
