Not familiar with these terms...

[Siony Mario]

Does anyone know the meaning of (a) FL in cloud tops ,and (b) LIFR, VFR,.. in cloud base?

[Gkikas LGPZ]

@Siony-Mario
For FL
https://en.wikipedia.org/wiki/Flight_level
(aprox. FL is houndred of feet,
e.g. FL080=8.000ft, FL240=24.000ft etc).

For VFR/LIFR
https://en.wikipedia.org/wiki/Visual_flight_rules
and
http://aviationknowledge.wikidot.com/aviation:visual-flight-rules

In general it has to do with visibility and cloud base height.

[Gkikas LGPZ]

@Siony-Mario
if you press the LIRF ... VFR color bar,
you'll see the limits for each Flight Rule