| LTQ | Light-Triggered and [light]- Quenched |
| CBL | Communication By Light |
| LM | Light Microscopy |
| LB | Light Bomber |
| LTV | Light To Voltage |
| LER | Light Emitting Resistor |
| LED | Light Emitting Diode Leuchtdiode |
| LAS | Light Absorption Sensitizer |
| LAD | Light-Assisted Deposition |
| LHC | Light-Harvesting Complex |
| LIDAR | LIght Detection And Ranging |
| LIM | Light Intensity Modulation |
| LWP | Light Weight Process |
| PLM | Polarized Light Microscopy |
| RLS | Resonant Light Scattering |
| SLT | Standardized Light Source |
| LIDAR | Light Detection and Ranging |
| ISL | Imperceptible Structured Light |
| LEP | Light Emitting Polymer |
| ALP | Available Light Photography [engl.] Restlichfotografie |
| DLS | Dynamic Light Scattering |
| DLP | Digital Light Processing |
| ELO | Electric Light Orchestra http://www.elomusic.com |
| ELS | Electrophonetic Light Scattering [alt.:LDV] |
| IILE | Ion-Induced Light Emission |
| CLS | Constant Light Signal |
| PLED | Polymer Light-Emitting Diode |
| calm | Computer Aided Light Microscopy |
| OLED | Organic Light-Emitting Diode organische Leuchtdiode |
| SALS | Small-Angle Light Scattering |
| VEIL | Video Encoded Invisible Light |
| CILS | Collision-Induced Light Scattering |
| IRLED | Infrared Light Emitting Diode |
| ALC | Adaptive Light Control [engl.] Beleuchtungsregelung im Auto |
| DSM | Dynamic light Scattering Mode |
| ISS | Impulsive Stimulated [light] Scattering |
| ILM | Industrial Light + Magic, Inc. [G. Lucas] |
| LEC | Light-emitting Electrochemical Cell |
| HALS | Hindered Amine Light Stabilizer |
| ALRV | American Light Rail Vehicle [engl.] Versuch einer Standardisierung amerikanischer Strassenbahnwagen |
| BLE | Bombardment-induced Light Emission [engl.] |
| FOLED | Flexible Organic Light Emitting Display |
| LASER | Light Amplification by Stimulated Emission of Radiation |
| LWDRM | Light Weight Digital Rights Management |
| CFL | Cold Fluorescent Light [Lamp] [engl.] |
| DILA | Direct-Drive Image Light Amplifier [D-ILA] |