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G8MNY > TECH 27.06.20 08:10l 40 Lines 1072 Bytes #999 (0) @ WW
BID : 60788_GB7CIP
Read: DJ6UX DF7EAV OE7FMI GUEST
Subj: Light Levels
Path: DB0FHN<OE2XZR<OE5XBL<F1OYP<ON0AR<VK6HGR<GB7CIP
Sent: 200627/0707Z @:GB7CIP.#32.GBR.EURO #:60788 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
This is old data but still useful. (updated Mar 04)
WHERE LUX
Clear Night Full Moon 0.3
Candle @ 1M 1
Side Roads 4
Main Roads 16
Staircases, Railway Platforms. 30-60
Secondary Rooms, Basements, Halls. 120
Living Rooms & Offices. 250
Classrooms, Shops & Workshops. 500
Drawing Office, Precision Workshops. 1000
Winters Day, Overcast Sky. 900-2000
Winters Day, Clear Sky. up to 9000
Summers Day in June, overcast sky. 4000-20,000
Summers Day in June, Sunshine. Approx 100,000
1 Lux = 1 Lumen over 1M
1 Lumen = 1 standard Candle over solid Steradian <.
LIGHT WAVELENGTH
COLOUR nano M
Red 690
Orange 600
Yellow 560
Green 520
Cyan 490
Blue 450
Violet 415
Note: 300 nano M = 1 Peta Hz = 10^15Hz
Why Don't U send an interesting bul?
73 De John, G8MNY @ GB7CIP
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