Good base for warm light (4)

I believe the answer is:

glow

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'warm light' is the definition.
'glow' can be an answer for 'light' (glow is a kind of light). I'm unsure of the 'warm' bit.

'good base' is the wordplay.
'good' becomes 'g' (abbreviation).
'base' becomes 'low' (synonyms).
'g'+'low'='GLOW'

'for' is the link.

Can you help me to learn more?

(Other definitions for glow that I've seen before include "Burn without flame" , "warmth of feeling" , "rosy colour" , "Shine with heat" , "Brightness" .)

I've seen this clue in The Telegraph.

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