Design an amazing 'Big Ideas Summit' logo

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This customer received 160 logo designs from 33 designers. They chose this logo design from ZRAKdesign as the winning design.
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We need a logo for the Big Ideas Summit. We would prefer to have something without a lightbulb. It needs to reflect concepts like conversations, thinking out of the box, working together. can have up to three colours and but also must be suitable as a one colour logo. Other key words are fresh, informative and informal.
Updates
Project Deadline Extended
Reason: Hello, my father in law was taken to hospital on the 25th and early this morning (27th). I have not been able to provide feedback for designers during this time so I'm extending the time. Thank you for your understanding.
Added Wednesday, October 26, 2016
Target Market(s)
SME business owners and managers, not for profit organisations managers.
Logo Text
Big Ideas Summit
Logo styles of interest
Abstract Logo
Conceptual / symbolic (optional text)



Font styles to use
Colors
Colors selected by the customer to be used in the logo design:
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.
Elegant
Bold
Playful
Serious
Traditional
Modern
Personable
Professional
Feminine
Masculine
Colorful
Conservative
Economical
Upmarket
Requirements
Must have
- Name (Big Ideas Summit) and an image. The words could create an image or the image is a separate thing.
Nice to have
- I like the types of colours selected but we only want no more than three in the logo, preferably two.
Should not have
- Lightbulb or picture of a mountain