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wrote:
An artist friend of mine asked me to help her with a project she is
designing.
snip
Is this possible, do these new high output LED have enough jazz to
replace a 25 0r 40 watt incandescent bulb.?

Yes.

Are they dimable?

Sure.

How much extra would be involved in the control circuitry to drive the
LEDs?

The control circuitry is practically free.

Of course, the LEDs will come in at around $100/$160 per bulb equivalent.
And will probably need a fan, or heatsink per.

Any help would be appreciated.

Paul K. Dickman