Light Bulb
Name | light meter (ISO 100, T 125) | ||
---|---|---|---|
ikea 9W 5000K bulb | inner: F5, EV12 | softbox: F1.8, EV9 | 1m: F0.8, EV6.5 |
set photo 135W 5500K bulb | inner: F6.3, EV12.8 | softbox: F3.2, EV10.7 | 1m: F1.1, EV7.3 |
Color Temperature and Lumens
Quick Notes:
- 5000K, like sun light look (cool)
- 2700k, like flame look (warm)
- Warm Color Temperatures (2700K to 3500K):
- people more like these color, often seen in home and hotel or restaurant
- Cool Color Temperatures (4000K to 4500K):
- often as task lighting in offices, kitchen under-cabinet lighting or craft rooms
- human see higher color temperatures to be “brighter” (lumens) than warm temperature
- human see higher color temperatures to be “clean” (like those product flash shots, flash is 5600K)
- human see higher color temperatures to be making “Object Color Clear” and “Things to spot clean”, like toilet, kitech cleaning check
- Full Spectrum Color Temperatures - Daylight = full sepctrum (5000K to 6500K): often seen in museums, jewelry stores, showcase windows, and hospitals
Object Color Distort by Color Temperature
- color temperature + light brightness + rendering (Color Rendering Index - CRI) can cause human see/precept color “Differently”
- Fight Between “Camera White Balance setting” and “Light Color Temperature”
LED Lights
- E27: means standard Edison screw bulb, 27mm diameter (Thumb size), [also used in cheap softbox lights]
- E14 (SES): small Edison screw mount, 14mm diameter (pinky size)
- E17 (IES): intermediate, like for microwave
- E12 (CES): Candelabra, like for decoration
- E10 (MES): miniature, like torch buibs
- Illuminance (照度):
- Luminous energy per unit time
- If you ILLUMINATE an object and measured the amount of light being projected towards it by the light, that is ILLUMINANCE
- lux (= lumen per square metre)
- Luminous flux, luminous power (光通量):
- Luminous flux incident on a surface
- LUMINANCE is the amount of light reflected off the surface being ILLUMINATED!
- lumens = Luminous flux
- ref:
Light | Temperature | accuracy | watte | lumens | vari | Modifier | Price | Exposure | |
---|---|---|---|---|---|---|---|---|---|
Godox SL60W | 5600k+200K | CRI93 | 60W | 4500 | 10-100% | Bowens mount | 125sgd | remote | (60cm, direct) EV10.5 (1/60,iso100,f5) (60cm,umbrella) EV9 (1/60,iso100,f2.8) |
Aputure 120D ii | 5500k | CRI96 | 180W | 14300 | 1000sgd | remote | |||
Godox SL200W | 5600k+200K | 200W | 20000 | 500sgd | |||||
TRADFRI LED E27 980lm | 2.2-2.7,4k | 980 | ~ | 40sgd | remote | ||||
TRADFRI LED E27 1000lm | 2.7k? | 1000 | ~ | 30sgd | remote | ||||
RYET LED E27 1000lm | 5k | 9W | 1000 | 3sgd | (60cm, diffuse, 3x) EV9 (1/60,iso100,f2.8) | ||||
LEDARE LED E27 1000lm | 2.7k-warmer | CRI90 | 11W | 1000 | ~ | 5sgd | |||
LEDARE LED E27 1000lm | 2.7k-warmer | 1000 | ~ | 8sgd | |||||
LEDARE LED E27 1600lm | 2.7k-warmer | 16W | 1600 | ~ | 10sgd |
- Godox SL60W review
- Aputure 120D review: