- Graphic Equalizer
- Fat Frog
- Leviton
- Gain Structure
- Frequency Response
- Infrared
- LeMaitre
- Gobo Holder
- Fire Curtain
- Fire Extinguishers, Types of
- Feedback
- GBF
- LCL
- Flying Faders
- HMI
- GAC
- High End Systems
- I-Cue
- Intercom Systems
- Lua
- focus tapes
- focus chart(s)
- Load diversity
- knuckle buster
- Gridlock Clamp
- Kee Klamp
- Heyco
- HeliCoil
- Luan
- Johnson bar
- Furman
- Juice Goose
- Littlite
- IGBT
- Headphone short
- fanning
- Greenroom
- Go Up
- JFGI
- Linnebach Projector
- GFP
- GFI
- IMAX
- IMAG
- GFCI
- Greenie
- Graceful Abort
- Half-Coupler
- Hanger Iron
- Focus cloth
- Hanging tape
- Hanging Iron
- Instrument
- Kukaloris
- Glossary (1)
- Glossary
- LEE
- GAM
- Line connector
- Load connector
- Load, Types of
- Listed, by NRTL
- IFCB
- LX
- IATSE
- IBEW
- Gaffer Tape
- hot restrike
- FOH
- ISO
- IEEE
- jumper
- knot tying
- Humbucker
- LBO
- Harmonics
- Flying Effects
- feeder (1)
- Feeder
- Lighting Concept/Lighting Statement
- juice
- Joule
- luminous efficacy
- IERP=AVOW
- Kellems Grip
- iris-gobo
- Iris
- half-hat
- junction box
- Ground Plan
- ghost light
- ghost load
- Hold last look
- L6-20
- Lock-Out/Tag-Out
- Kliegl Bros.
- IAEI
- LDI
- hod, hodding
- lamp sing
- hard-reset
- globe
- Load-In
- Load-Out
- Goal Post
- Foot-candle
- Gel cutting tips
- Hang Tape
- LORT
- Lense
- Lenes
- Lighting Supervisor
- Line Level
- Flourescence
- light plot (1)
- Fresnel
- Law of Squares
- Hanging a Light
- Fly Tower
- LEKO
- Inverse Square Law
- Lumen
- Floor Pocket
- House
- Lens
- Lamp/Globe
- Fluorescence
- Gaseous Discharge
- Incandescence
- Light Plot
- Gobo
- Gel