Luminous mushroom

[=?iso-8859-1?Q?B=F6rge?= Pettersson]

Dear all,
I would like to know to which species or at least genus this
self-luminous mushroom belongs, if somebody can help me with the
determination. The photo is from the cloud-forest in Monteverde,
Costa Rica 11 October this year, but the species is probably rather
widespread in the tropics. The second photo is the same species in
flash-light.
You will find the pictures at:
http://arbetsplats.slu.se:4032/Shared%20Documents/Lyssvampar.jpg and
http://arbetsplats.slu.se:4032/Shared%20Documents/LyssvamparBlixt.jpg

Many thanks in advance
B?rge Pettersson