I recently bought a property that has downlights in every corner of the house. The downlights are the basic reflector type downlights with no cover.

Previously, 18w/20w CFL bulbs were used in the downlights. However, I want to change these as the bulbs are old (many are no longer working), and I want to use a different colour temperature as well. Plus I can get energy efficient LEDs at a decent price.

Now, having got the LEDs, I realize something. They are 115mm in height. The older CFLs were 150mm in height. The downlight depth appears to be around 150mm as well (matching the height of the CFLs). This causes shadow effects.

Something like this (but not anywhere near as bad, the shadows are significantly higher): https://i.imgur.com/DP8ywTT.jpg

Is there a way I can adjust the downlight depth to get a more even lighting on the walls? The LED bulbs that are "longer" (eg 140mm) are all too bright (as there are many downlights throughout, it would be overkill).

Appreciate your assistance.