The Colour Pink does not have a corresponding Light spectra - it's "leftover" Green light

Sale 1

http://www.tf2outpost.com/trade/27385052 Sold for 25 keys

B/O for Tree was 25

X = 25

Keys https://gyazo.com/7bad96929b4a97c4bad02b5a27e47d9f http://backpack.tf/profiles/76561198135308806?time=1447056000&compare=1447315200

Tree http://backpack.tf/item/4076599868

Sale 2 OUTLIER

[No OP Trade] Sold for 20.9 keys of sweets

X = 20.9*0.9

X = 19

Tree http://backpack.tf/item/4076599868

Stuff https://gyazo.com/30cf50e1afb2f539579394dd01440532 http://backpack.tf/profiles/76561198093926010?time=1446361200&compare=1446710400

Sale 3

http://www.tf2outpost.com/trade/27469463 Sold for Aussie Knife

B/O for Tree was 25

X = 22

Knife http://backpack.tf/item/4196366946

Trade http://backpack.tf/profiles/76561198167283739?time=1450339200&compare=1449993600

Tree http://backpack.tf/item/4156988628

Trade was Escrow'd

Sale 4

http://www.tf2outpost.com/trade/27582255 Sold for 23 keys + S. FN Masked Mender

B/O for Tree was 25

X = 23 + 4.1*0.9

X = 27

X = 25 (B/O)

Keys https://gyazo.com/3e6b54b673123a58558e6c1f22db80cd http://backpack.tf/profiles/76561198072240925?time=1450512000&compare=1450598400

Tree http://backpack.tf/item/4156988628