How do you put a replacement light bulb in a Dimplex fire model number WHT20?

If you look at the bars going across the front,under the second one down in each corner is a screw. They are small Philips screws - painted black. Undo them and pull the front away. Make sure you take all the coal bits off first! You will need 2 narrow thread screw in 40w candle bulbs.