Lighting MCB tripping from time switch

[dnalevy]

I have the lights to come on with a timeswitch and every so often the lighting circuit 16A MCB trips. Everything is fine when turning lights on 1 by 1.
The lights being turned on are as follows:
2 low energy 13w fluorescent bulbs.
3 50w gu10 halogen bulbs.
4 100w halogen bulbs.

However they can all be turned on at once usually its just in the morning or after they've been off for a while it trips but even then not always.
Please help ist here a short or is the MCB not a high enough rating?

[securespark]

Why 16A on lighting??

What size cable feeds those lights?

If it is 1.0milli, then you need to downrate the CPD.

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As George Michael once said, "..if you're gonna do it, do it right, right?"

[Lectrician]

100w halogens? What type are these?

16amp? Do you mean 6, or seriously 16?

A little more info required.

[RF Lighting]

Also what type is the MCB? This will be written as a letter. Usually 'B' but possibly 'C' or 'D'

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I downlights