Red LEDs vs Yellow Incandescents (2700K) Red LEDs look like the perfect solution.. But are they really? Let's talk about it.. Red LED (~620-635 nm) basically has ZERO blue. Incandescent (2700K) follows Nature’s blackbody spectrum. Its small amount of blue is naturally balanced by a huge amount of red & infrared (IR). At lower brightness (using dimming via variac transformer/resistor-based dimmer), the blue component can shrink even more. Standard Red LED → No Infrared 2700K Incandescent → Emits Infrared Standard Red LED → High Flicker (PWM & Driver-Induced) 2700K Incandescent → Minimal Flicker due to thermal inertia Standard Red LED → Generates a lot of Dirty Electricity 2700K Incandescent → No Dirty electricity Standard Red LED → Artificial Narrow spectrum light 2700K Incandescent → Full spectrum light The human brain and skin require heat (infrared) to accompany light. That rules out everything but the Sun, Fire and Incandescent light. Choose wisely.