Ratio
3.7:1
Pre-light calculator · iOS
Know what your light will do before you rig it.
Beam quality, color, diffusion, T-stops — from manufacturer photometric data, rendered on a sphere. Every number is an estimate. We never call it measured.
Built by GripTools, a lighting rental house in Seoul
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Exposure
T 2.8½
Draw
1,440 W
On set
Pre-light is still done on memory and hope.
Guessing the throw.
You remember the 600d is "about enough" at 3 meters. Then the ceiling's higher than you thought and the schedule slips.
Over-ordering to be safe.
Not sure one head covers it? Book two. The truck gets heavier and half of it goes back untouched.
Numbers you can't trust.
Marketing lux figures and rounded specs. You want the honest estimate, not the sales sheet.
How it works
Fixture to shoot-ready in under a minute.
01
Pick fixture, modifier & diffusion
Choose from 93 fixtures, add a modifier, pick a diffusion.
93 fixtures
02
See it on the sphere
Soft or hard, ratio, T-stop, power draw — updated live as you change distance or dimmer.
3.7:1 · T 2.8½
03
Hand off the plan
Floor plan and settings in one Export card — for your DP or gaffer chat.
1,440 W
93
fixtures, all free
5
fixture brands
<1 min
to a shoot-ready look
Fixture library
93 fixtures. All of them free.
ARRI
Aputure
Nanlux
Nanlite
GodoxSOON
Kino Flo
Kino FloSOON
Litepanels
LitepanelsSOON
LiteGear
LiteGearSOON
Creamsource
CreamsourceSOON
Fiilex
FiilexSOON
Quasar Science
Quasar ScienceSOON
K5600
K5600SOON
Mole-Richardson
Mole-RichardsonSOON
Prolycht
ProlychtSOON
Velvet
VelvetSOON
Hive
Hive5 brands in the database today — SOON marks are on the roadmap, not in the app yet.
Aputure 600dLED
Aputure 1200d ProLED
Aputure 300d IILED
Aputure LS 60dLED
Nanlite Forza 720LED
Nanlite Forza 500 IILED
Nanlite PavoTube 30CTUBE
Nanlux Evoke 1200LED
Nanlux Evoke 2400BLED
Nanlux Dyno 650CLED
ARRI SkyPanel S60-CLED
ARRI OrbiterLED
ARRI M18HMI
ARRI 650 PlusTUNG
Godox VL300LED
Godox KNOWLED MG1200BiLED
Showing 16 of 93 — every one free, no paywall.
Logos belong to their respective manufacturers — shown to state factually which fixtures Falloff covers.
We don't sell knowledge. We sell the labor it saves.
The fixture data and the physics are free. Every number is an estimate, and we say so — no app beats a meter on set. Falloff is for the decisions you make before the truck is packed.
Light your next setup before you load the truck.
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