Hi Azuma
I think it Jalan Besar is one great place to start. I have tried Geylang and their lights are not cheap. ALWAYS REMEMBER, ask got GST first before they qoute. There are basically 3 mode of practice in their sales...
Mode 1:
Discount $5~10 on items over $300 then kick in 7% GST when you think you have gotten yourself the best bargain. Usually stuff like flourescent lamp which are cheap, they mark up to $50 dollars and tell you give you at $30.
Mode 2:
Collect everything you want, *usually mark up higher, say give you a 15% on all items... but usually there are 3~4 items (High price stuffs) they say cannot give discount. Then once everything in place, they add in GST.
Mode 3:
All price qoute to you inclusive of GST.
Most shops in that area basically sells the same stuff, so compare a few first before you decide. Do note that if the price is at extreme end, check with them the brand of the ballast. Because in all lightnings, the Ballast plays a very important part. No point you go for cheapo ballast and they fail within a few months, they are difficult to replace, especially those in your L-Box... or conceal in your false ceilings
For your hobs and hood, jalan besar is also a place to look out for. However, do understand your needs in the hob and hood, it can greatly influence your purchase decision. Heavy Cooker? Non-cooker? Light-Cooking?